CN103872697A - Variable frequency type three-phase photovoltaic inverter system and control method thereof - Google Patents
Variable frequency type three-phase photovoltaic inverter system and control method thereof Download PDFInfo
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Abstract
The invention relates to a photovoltaic inverter system and a control method thereof, in particular to a variable frequency type three-phase photovoltaic inverter system and a control method thereof. The variable frequency type three-phase photovoltaic inverter system comprises a master control part, an inverter circuit, a detection circuit, a storage battery charging and discharging circuit, a storage battery interface, a photovoltaic assembly interface, a power frequency load interface, a variable frequency load interface, an electronic control switch, a warning answering device, and an optional isolation transformer. The control method comprises the following steps: when the variable frequency load requests to supply power, on the premise that all power frequency loads are allowed to be powered off, all power frequency loads are disconnected and forbidden to be switched on, and the variable frequency load is powered on in a variable frequency mode; when the frequency is changed into a constant power frequency, a system automatically electrifies the power frequency loads which are allowed to be electrified one by one by referring to the important grade set in advance by a user, wherein the power sum of the power frequency loads is not more than the residual power generation capacity of the system. For the photovoltaic power generation system with the motor type load, the amount of the photovoltaic assembly can be reduced at the beginning of the scheme design by the invention, and the installation cost is lowered.
Description
Technical field
The present invention relates to a kind of photovoltaic inverting system and control method thereof, relate in particular to a kind of variable ratio frequency changer type three-phase photovoltaic inverting system and control method thereof.
Background technology
Along with the development of modern industry, the non-renewable energy resources such as oil, coal, natural gas are day by day rare, and the new forms of energy take solar energy as representative meet the tendency of the day of global low-carbon economy, obtained approval, the attention of countries in the world government and helped.
Photovoltaic generation related industry was developed rapidly in recent years, but even to this day, with respect to using as the conventional power generation systems of the non-renewable energy resources such as coal, oil, photovoltaic generation is still in a disadvantageous position on cost.This just requires scientific worker constantly to explore, and on the one hand, improves as much as possible the conversion efficiency of photovoltaic generating system, reduce the wastage, on the other hand, the installing cost of reduction photovoltaic generating system by every means.
Now; in electrical load, there is electric machinery load quite a lot; this class loaded in the short time of startup; need larger power; photovoltaic generating system not only provides active power; a certain amount of reactive power also must be provided simultaneously; power consumption significantly increases during than stable operation; thereby; photovoltaic generating system is at the beginning of design; designer can become the Capacity design of photovoltaic module than the rated power of load to have more the extremely wattage of several times of half conventionally, and undoubtedly, this has significantly improved the installing cost take photovoltaic module as main photovoltaic generating system.
Summary of the invention
Variable ratio frequency changer type three-phase photovoltaic inverting system of the present invention, it is the core component of photovoltaic generating system, cost and traditional inverter difference are little, in function, can overcome above-mentioned shortcoming, for electric machinery load, deal with problems from the angle of frequency conversion, by reducing the capacity of photovoltaic module, the installing cost of photovoltaic generating system is significantly reduced.In addition, the power management of science of the present invention and control method also to the saving of the energy with efficiently utilize significant.
" power frequency " implication in all associated description of the present invention is the frequency of a country civil power, commercial power, includes but not limited to 50 hertz, 60 hertz.
Variable ratio frequency changer type three-phase photovoltaic inverting system of the present invention comprises main control part, inverter circuit, testing circuit, accumulator charging/discharging circuit, storage battery interface, photovoltaic module interface, power frequency loading interfaces, frequency conversion loading interfaces, electric-controlled switch, warning answering device, transformer is optional, and wherein main control part and inverter circuit, testing circuit, accumulator charging/discharging circuit, photovoltaic module interface, power frequency loading interfaces, frequency conversion loading interfaces, electric-controlled switch, warning answering device are electrically connected respectively; The DC side three of photovoltaic module interface, accumulator charging/discharging circuit and inverter circuit is electrically connected each other; Accumulator charging/discharging circuit and the electrical connection of storage battery interface; The alternating current-direct current both sides of testing circuit and accumulator charging/discharging circuit, electric-controlled switch, inverter circuit are electrically connected respectively; Power frequency loading interfaces, frequency conversion loading interfaces are directly electrically connected or are indirectly electrically connected through transformer with inverter circuit AC respectively.The quantity of power frequency loading interfaces is one or parallel with one another multiple, and the quantity of frequency conversion loading interfaces is one or parallel with one another multiple.Each part can merge or split in function or structure above.
Main control part and electric-controlled switch, warning answering device communicate by wired or wireless mode respectively: wire communication mode includes but not limited to universal serial bus, parallel bus, one or more holding wire; Communication includes but not limited to radio frequency, infrared, bluetooth, magnetic field.In addition, the state information of electric-controlled switch also can select circuit to be after testing sent to main control part.
Main control part of the present invention comprises one or more in microprocessor, microcontroller, is responsible for the core missions such as information gathering, analyzing and processing, decision-making output of whole system, is the control core of whole photovoltaic inverting system.Wherein the type of microcontroller includes but not limited to single-chip microcomputer, DSP, CPLD, FPGA, PLC.
The constituted mode that inverter circuit of the present invention can be selected includes but not limited to: comprise several unsteady flow brachium pontis or integrated power modules, for the situation that comprises unsteady flow brachium pontis, each brachium pontis is in series by multiple full control switching devices, fly-wheel diode of each full control switching device inverse parallel, " entirely controlling switching device " during the present invention describes refers to control the electronic power switch device of opening and can control shutoff, and type includes but not limited to transistor, IGBT, MOSFET, IGCT, IEGT, GTO, SET; For the situation that comprises integrated power module, the type of integrated power module includes but not limited to IPM power model.
The level number of the topological structure of inverter circuit of the present invention is 2 or is greater than 2 odd number, and the type that is wherein greater than the topological structure of 2 odd number level includes but not limited to diode clamping type, striding capacitance type, unit cascaded type.
Electric-controlled switch in the present invention refers to can be by its switching device of opening, turn-offing of wired or wireless mode control, in type including but not limited to circuit breaker, contactor, relay, between inverter AC and load, can powering on, having a power failure and carry out remote control one or more load.
Testing circuit of the present invention includes but not limited to: the voltage sensor of the voltage sensor of the voltage sensor of inverter circuit AC and current sensor, inverter circuit DC side and current sensor, accumulator charging/discharging circuit.
The present invention comprises the auxiliary warning answering device of controlling, this warning answering device is positioned near each load, comprise audible alarm unit, light warning device, indicator light, charactron, display screen, one or more in display, also comprise warning answer button, and there is communication interface, main control part leads to one or more load, in a period of time before power-off remote operation, near warning answering device manipulation object can be selected sounding, luminous and information shows that one or more in three kinds of forms report to the police, whether alert judgement now allows remote operation and is replied by warning answer button, whether main control part is according to being replied in a period of time and the difference of reply content, carry out respectively follow-up manipulation according to the predefined program of user.
The concrete control method that the present invention is directed to variable ratio frequency changer type three-phase photovoltaic inverting system is as follows.
1. for all loads.
In the time that system operates in non-power frequency state, system disconnects and forbids connecting all other loading interfaces.
When system power supply operation, as system power supply ability declines, after inquiry, disconnect on-the-spot replying and allow power-off and the relatively low load of the predefined important level of user, as still not enough in power supply capacity, force the relatively low load of the predefined important level of disconnect user, until system power supply ability can meet the whole loads in running status.
When system power supply operation, as system power supply ability improves or has load to quit work, system can provide the power demand of the power frequency load of residual capacity and all requests power supply by comparison system, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user.
2. for frequency conversion load.
In the time that frequency conversion load requests is powered, select different control countermeasures depending on different situations:
The first situation, does not have other load in running status in system, close and forbid connecting all power frequency loading interfaces, connects the frequency conversion loading interfaces of request power supply, according to the predefined conversion system power supply of user;
Second case, has other load in the time of power frequency operation state in system, send warning at these load scenes, and prompting has frequency conversion load application electricity consumption, if there is the power down request of forbidding in answer signal, waits for, until this forbids that power-off signal disappears;
The third situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving all is on-the-spot without forbidding that power-off signal sends, but exist the load moving not reply answer signal, return signal is incomplete, and the logic of setting according to user is carried out subsequent operation;
The 4th kind of situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving all is on-the-spot without forbidding that power-off signal sends, and answer signal has all been replied in all loads that moving, and return signal is complete, according to the predefined conversion system power supply of user.
For frequency conversion load, no matter which kind of situation, in the time that frequency conversion load can power on, first disconnect all loading interfaces, connect afterwards the frequency conversion loading interfaces of request power supply, and forbid that other loading interfaces powers on, again, start, move according to the predefined conversion system of user, in the time that frequency becomes power frequency, system by can provide power and all before this disconnect power frequency load capacity demand contrast, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user.
For frequency conversion load, no matter which kind of situation, when frequency conversion loaded work piece is complete and power-off after, first the operation scene of each load of inquiry, system contrast afterwards can provide power and all power frequency load capacities that previously disconnected in real time, and scene is replied and allowed the some power frequency loads that power on to restore electricity one by one according to the predefined important level of user.
3. for power frequency load.
When the power supply of power frequency load requests, select different control countermeasures depending on different situations:
The first situation, does not have other load running, is directly this power frequency load energising.
Second case, has other load running at power frequency state, and system is can provide residual capacity can meet its power requirement time, directly connects power supply.
The third situation, there is other load running at power frequency state, and when system can provide residual capacity can not meet its power requirement, after inquiry, scene is replied and is allowed the important level of power-off can meet the power frequency load of request power supply than its low bearing power and system spare capacity summation, system disconnects and allows the important level of power-off than its low load, and to this power frequency load energising.
Circumstances outside above-mentioned three kinds of situations, the power frequency load of request power supply must be waited for.
With respect to conventional photovoltaic inversion system, advantage of the present invention includes but not limited to following aspect:
First, an obvious advantage is: for electric machinery load, photovoltaic inverting system of the present invention is down to close to limiting value the design capacity of photovoltaic module, only need be slightly larger than the rated power of load.For same electric machinery load, in the traditional design scheme of current extensive use, the design capacity of photovoltaic module is generally 1.5 times to 3 times of present design, the higher application scenario of indivedual reactive power demands even reaches more than 3 times, and this has significantly improved the installing cost take photovoltaic module as main photovoltaic generating system now.
Secondly, in During Process of Long-term Operation, for a large amount of motors that exist in electrical load, power frequency startup is generally accompanied by large electric current, high power and all multiple-harmonics, significantly reduced the useful life of motor, and excessive electric current, too high apparent power, too much harmonic content also easily make inverter break down or damage, and bring extra loss.
Accompanying drawing explanation
Fig. 1 is the primary side electrical structure schematic diagram of the embodiment of the present invention.
Fig. 2 is control and the testing circuit schematic diagram of the embodiment of the present invention.
Fig. 3 is the main control part circuit theory diagrams of the embodiment of the present invention.
Fig. 4 is the inverter circuit schematic diagram of the embodiment of the present invention.
Embodiment
Following examples belong to the one in concrete form of the present invention, and the object providing is more detailed description the present invention, rather than limits the scope of the invention, and neither limit application form of the present invention.
The present embodiment as shown in Figure 1 to 4.
The present embodiment comprises main control part, inverter circuit, accumulator charging/discharging circuit, storage battery interface, testing circuit, photovoltaic module interface, power frequency loading interfaces, frequency conversion loading interfaces, electric-controlled switch, warning answering device, and the primary side electrical structure schematic diagram of the present embodiment as shown in Figure 1.
The testing circuit of the present embodiment includes but not limited to:
1. the voltage sensor of inverter circuit AC;
2. the current sensor of inverter circuit AC;
3. the voltage sensor of inverter circuit DC side;
4. the current sensor of inverter circuit DC side;
5. the voltage sensor of accumulator charging/discharging circuit;
6. electric-controlled switch state aware circuit.
The control of the present embodiment and testing circuit schematic diagram are as shown in Figure 2.
As shown in Figure 3, U1 is microcontroller to the main control part circuit theory diagrams of the present embodiment, the operation of system is accurately controlled, and sensing data is carried out to real-time analysis decision-making; U17 is the crystal oscillator that accurate clock is provided for microcontroller; U11 is the memory for storing data; Main control part carries out information exchange with external function module respectively by interfaces such as J11, J12, J13, J15, J20, J21, J31, J32, wherein J11 is switch value input interface, the switching value information such as the overvoltage protection that sends including but not limited to system, under-voltage protection, overcurrent protection, overheat protector, overload; J12 is switching value output interface, and the switching value control information of main control part is sent through this interface; J13 is serial communication interface; J15 is microcontroller programming interface; J21 is the data/address bus interface for parallel communications; J31 is SPI communication interface; J32 is SCI communication interface; Microcontroller accurately calculates real-time pulse width information, and through J20 interface output pwm pulse.
The type selecting contactor of electric-controlled switch in the present embodiment, between inverter AC and load, can and can only powering on, turn-offing and carry out remote control a road load wherein.
Main control part in the present embodiment carries out the transmission of information with warning answering device by the mode of many holding wires; The control command of main control part reaches electric-controlled switch through holding wire; The state information of the electric-controlled switch after testing electric-controlled switch state aware circuit in circuit is sent to main control part.
Warning answering device in the present embodiment is positioned near each load, in functional structure, comprise acoustic-optic alarm and warning answer button, and there is communication interface, main control part is leading to one or more load, in a period of time before power-off remote operation, under the control of main control part, near warning answering device meeting sound and light alarm manipulation object, remind operating personnel's judgement now whether to allow remote operation and replied by warning answer button, whether main control part is according to being replied in a period of time and the difference of reply content, carry out respectively follow-up manipulation according to the predefined program of user.
The inverter circuit schematic diagram of the present embodiment as shown in Figure 4, this inverter circuit adopts the topological structure of three-phase two level, contain three identical unsteady flow brachium pontis of structure, each unsteady flow brachium pontis is in series by two groups of IGBT that are parallel with fly-wheel diode, and inverter circuit DC side parallel has Support Capacitor Cd1.
The present embodiment is for dissimilar load, and the concrete control method of employing is as follows:
1. for all loads: in the time that system operates in non-power frequency state, system disconnects and forbids connecting all other loading interfaces.When system power supply operation, as system power supply ability declines, after inquiry, disconnect on-the-spot replying and allow power-off and the relatively low load of the predefined important level of user, as still not enough in power supply capacity, force the relatively low load of the predefined important level of disconnect user, until system power supply ability can meet the whole loads in running status.When system power supply operation, as system power supply ability improves or has load to quit work, system can provide the power demand of the power frequency load of residual capacity and all requests power supply by comparison system, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user.
2. for frequency conversion load.In the time that frequency conversion load requests is powered, select different control countermeasures depending on different situations:
The first situation, does not have other load in running status in system, close and forbid connecting all power frequency loading interfaces, connects the frequency conversion loading interfaces of request power supply, according to the predefined conversion system power supply of user; Second case, has other load in the time of power frequency operation state in system, send warning at these load scenes, and prompting has frequency conversion load application electricity consumption, if there is the power down request of forbidding in answer signal, waits for, until this forbids that power-off signal disappears; The third situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving all is on-the-spot without forbidding that power-off signal sends, but return signal has disappearance, the logic of setting according to user is carried out subsequent operation; The 4th kind of situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving all is on-the-spot without forbidding that power-off signal sends, return signal does not lack, i.e. answer signal has all been replied in all loads that moving, according to the predefined conversion system power supply of user.
For frequency conversion load, no matter which kind of situation, in the time that frequency conversion load can power on, first disconnect all loading interfaces, connect afterwards the frequency conversion loading interfaces of request power supply, and forbid that other loading interfaces powers on, again, start, move according to the predefined conversion system of user, in the time that frequency becomes power frequency, system by can provide power and all before this disconnect power frequency load capacity demand contrast, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user.
For frequency conversion load, no matter which kind of situation, when frequency conversion loaded work piece is complete and power-off after, first the operation scene of each load of inquiry, system contrast afterwards can provide power and all power frequency load capacities that previously disconnected in real time, and scene is replied and allowed the some power frequency loads that power on to restore electricity one by one according to the predefined important level of user.
3. for power frequency load.When the power supply of power frequency load requests.Select different control countermeasures depending on different situations:
The first situation, does not have other load running, is directly this power frequency load energising; Second case, has other load running at power frequency state, and system is can provide residual capacity can meet its power requirement time, directly connects power supply; The third situation, there is other load running at power frequency state, and when system can provide residual capacity can not meet its power requirement, after inquiry, scene is replied and is allowed the important level of power-off can meet the power frequency load of request power supply than its low bearing power and system spare capacity summation, system disconnects and allows the important level of power-off than its low load, and to this power frequency load energising; Circumstances outside above-mentioned three kinds of situations, the power frequency load of request power supply must be waited for.
With respect to conventional photovoltaic inversion system, advantage of the present invention is: first, variable ratio frequency changer type photovoltaic inverting system is down to close to limiting value the design capacity of photovoltaic module, only need be slightly larger than the rated power of load, than traditional design scheme, the present invention is significantly reduced the installing cost of photovoltaic generating system.Secondly, have a large amount of motors in electrical load, variable frequency starting significantly increases the useful life of motor, and, reduce harmonic current and apparent power as far as possible and also make the probability of failure of inverter greatly reduce, and reduce loss.
Except above-mentioned, the power management of science of the present invention and control method are also significant with saving to the efficient utilization of the energy.
The present invention has higher promotional value at new forms of energy and energy-saving and emission-reduction field.
Claims (10)
1. a variable ratio frequency changer type three-phase photovoltaic inverting system, it is characterized in that comprising main control part, inverter circuit, testing circuit, photovoltaic module interface, one or multiple power frequency loading interfaces parallel with one another, one or multiple frequency conversion loading interfaces parallel with one another, transformer is optional, and wherein main control part and inverter circuit, testing circuit, photovoltaic module interface, power frequency loading interfaces, frequency conversion loading interfaces are electrically connected respectively; The DC side electrical connection of photovoltaic module interface and inverter circuit; Power frequency loading interfaces, frequency conversion loading interfaces are directly electrically connected or are indirectly electrically connected through transformer with inverter circuit AC respectively, and above each part can merge or split in function or structure.
2. variable ratio frequency changer type three-phase photovoltaic inverting system according to claim 1, it is characterized in that the constituted mode that inverter circuit can be selected includes but not limited to: comprise several unsteady flow brachium pontis or integrated power modules, for the situation that comprises unsteady flow brachium pontis, each brachium pontis is in series by multiple full control switching devices, fly-wheel diode of each full control switching device inverse parallel, " entirely controlling switching device " during the present invention describes refers to control the electronic power switch device of opening and can control shutoff, type includes but not limited to transistor, IGBT, MOSFET, IGCT, IEGT, GTO, SET, for the situation that comprises integrated power module, the type of integrated power module includes but not limited to IPM power model.
3. variable ratio frequency changer type three-phase photovoltaic inverting system according to claim 2, is characterized in that comprising accumulator charging/discharging circuit, storage battery interface, and accumulator charging/discharging circuit and storage battery interface, inverter circuit DC side, main control part are electrically connected respectively.
4. variable ratio frequency changer type three-phase photovoltaic inverting system according to claim 3, is characterized in that testing circuit includes but not limited to: the voltage sensor of the voltage sensor of inverter circuit AC and current sensor, inverter circuit DC side and current sensor, accumulator charging/discharging circuit voltage sensor.
5. variable ratio frequency changer type three-phase photovoltaic inverting system according to claim 4, it is characterized in that main control part comprises one or more in microprocessor, microcontroller, wherein the type of microcontroller includes but not limited to single-chip microcomputer, DSP, CPLD, FPGA, PLC, the level number of the topological structure that the inverter circuit that main control part is controlled in real time adopts is 2 or is greater than 2 odd number, and the type that is wherein greater than the topological structure of 2 odd number level includes but not limited to diode clamping type, striding capacitance type, unit cascaded type.
According to claim 1 to variable ratio frequency changer type three-phase photovoltaic inverting system claimed in claim 5, it is characterized in that comprising electric-controlled switch, this electric-controlled switch is between inverter AC and load, can carry out remote electric manipulation to one or more load, in type, including but not limited to circuit breaker, contactor, relay, main control part and electric-controlled switch carry out signal transmission by wired or wireless mode: wire communication mode includes but not limited to universal serial bus, parallel bus, one or more holding wire; Communication includes but not limited to radio frequency, infrared, bluetooth, magnetic field, and in addition, the state information of electric-controlled switch also can select circuit to be after testing sent to main control part.
According to claim 1 to variable ratio frequency changer type three-phase photovoltaic inverting system claimed in claim 5, it is characterized in that comprising warning answering device, this warning answering device is positioned near each load, comprise audible alarm unit, light warning device, indicator light, charactron, display screen, one or more in display and warning answer button, and there is communication interface, main control part leads to one or more load, in a period of time before power-off remote operation, near warning answering device manipulation object can be with sound, the mode that light or information show is reported to the police, remind operating personnel's judgement now whether to allow remote operation and replied by warning answer button, whether main control part is according to being replied in a period of time and the difference of reply content, carry out respectively follow-up manipulation according to the predefined program of user, between main control part and warning answering device, communicate by wired or wireless mode: the communication medium that wired mode adopts includes but not limited to universal serial bus, parallel bus, one or more holding wire, the communication medium that wireless mode adopts includes but not limited to radio frequency, infrared, bluetooth, magnetic field.
8. a control method for variable ratio frequency changer type three-phase photovoltaic inverting system, is characterized in that: in the time that system operates in non-power frequency state, system disconnects and forbids connecting all other loads; When system power supply operation, as system power supply ability declines, after inquiry, disconnect on-the-spot replying and allow power-off and the relatively low load of the predefined important level of user, as still not enough in power supply capacity, force the relatively low load of the predefined important level of disconnect user, until system power supply ability can meet the whole loads in running status; When system power supply operation, as system power supply ability improves or has load to quit work, system can provide the power demand of the power frequency load of residual capacity and all requests power supply by comparison system, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user.
9. the control method of variable ratio frequency changer type three-phase photovoltaic inverting system according to claim 8, it is characterized in that: in the time that frequency conversion load requests is powered, select different control countermeasures depending on different situations: the first situation, in system, there is no other load in running status, close and forbid connecting all power frequency loads, connect the frequency conversion load of request power supply, according to the predefined conversion system power supply of user, second case, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if there is the power down request of forbidding in answer signal, wait for, until this forbids that power-off signal disappears, take the one in control method under next the 3rd, the 4 two kind of situation depending on concrete condition, the third situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving is on-the-spot without forbidding that power-off signal sends, but exist the load moving not reply answer signal, have the phenomenon of signal deletion, the logic of setting according to user is carried out subsequent operation, the 4th kind of situation, in system, there is other load in the time of power frequency operation state, send warning at these load scenes, prompting has frequency conversion load application electricity consumption, if the load just moving all is on-the-spot without forbidding that power-off signal sends, and answer signal has all been replied in all loads that moving, there is not the phenomenon of signal deletion, according to the predefined conversion system power supply of user, no matter which kind of situation, in the time that frequency conversion load can power on, first disconnect all loads, connect afterwards the frequency conversion load of request power supply, and forbid that other load powers on, again, start according to the predefined conversion system of user, operation, in the time that frequency becomes power frequency, system by can provide power and all before this disconnect power frequency load capacity demand contrast, after inquiry, scene is replied and allowed the some power frequency loads that power on to connect one by one according to the predefined important level of user, no matter which kind of situation, when frequency conversion loaded work piece is complete and power-off after, first the operation scene of each load of inquiry, system contrast afterwards can provide power and all power frequency load capacities that previously disconnected in real time, scene is replied and allowed the some power frequency loads that power on to restore electricity one by one according to the predefined important level of user.
10. according to Claim 8 to the control method of variable ratio frequency changer type three-phase photovoltaic inverting system claimed in claim 9, it is characterized in that: when the power supply of power frequency load requests, select different control countermeasures depending on different situations: the first situation, there is no other load running, is directly this power frequency load energising; Second case, has other load running at power frequency state, and system is can provide the power requirement of the power frequency load that residual capacity can meet request power supply time, directly connects and powers; The third situation, there is other load running at power frequency state, and when system can provide residual capacity can not meet the power requirement of asking the power frequency load of powering, after inquiry, scene is replied and is allowed the important level of power-off can meet the power frequency load of request power supply than its low bearing power and system spare capacity summation, system disconnects and allows the important level of power-off than its low load, and the power frequency load of request power supply is switched on; Circumstances outside above-mentioned three kinds of situations, the power frequency load of request power supply must be waited for.
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| CN106797137A (en) * | 2014-09-12 | 2017-05-31 | 松下知识产权经营株式会社 | Power supply control apparatus, method for controlling power supply and power supply device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008295133A (en) * | 2007-05-22 | 2008-12-04 | Showa Shell Sekiyu Kk | Photovoltaic power generating system capable with power failure |
| CN101765959A (en) * | 2007-05-08 | 2010-06-30 | 美国电力转换有限公司 | Alternative-source energy management |
| US20100220508A1 (en) * | 2007-10-31 | 2010-09-02 | Kostal Industrie Elektrik Gmbh | Photovoltaic Inverter with Option for Switching Between a Power Supply System with a Fixed Frequency and a Load Variable Frequency |
-
2012
- 2012-12-18 CN CN201210551272.1A patent/CN103872697A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765959A (en) * | 2007-05-08 | 2010-06-30 | 美国电力转换有限公司 | Alternative-source energy management |
| JP2008295133A (en) * | 2007-05-22 | 2008-12-04 | Showa Shell Sekiyu Kk | Photovoltaic power generating system capable with power failure |
| US20100220508A1 (en) * | 2007-10-31 | 2010-09-02 | Kostal Industrie Elektrik Gmbh | Photovoltaic Inverter with Option for Switching Between a Power Supply System with a Fixed Frequency and a Load Variable Frequency |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106797137A (en) * | 2014-09-12 | 2017-05-31 | 松下知识产权经营株式会社 | Power supply control apparatus, method for controlling power supply and power supply device |
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