CN103795233B - A kind of modularity inverter power control method of intelligent start/stop polling mechanism - Google Patents

Abstract

The invention discloses the modularity inverter power control method of a kind of intelligent start/stop polling mechanism, including intelligence start, Bye-byes, poll start, poll shutdown；The present invention realizes Based Intelligent Control to intrasystem switch of the power supply module machine, make module be near maximum functional point during unlatching and put into new module, near 20% power points, unnecessary power module is closed during closedown, the system entirety of making realizes intelligent switch machine and controls, the power attenuation that minimizing system is unnecessary, improves system effectiveness；It is polled controlling to the work of intrasystem power module, realize each module and can act as the module that First puts into operation, and can realize each module can act as the pent module of First simultaneously, the equalization of the working time realizing each module the most to greatest extent controls, thus extends the service life of system.

Description

A kind of modularity inverter power control method of intelligent start/stop polling mechanism

Technical field

The present invention relates to a kind of field of solar thermal power generation, particularly relate to a kind of Modular photovoltaic inverter power supply Based Intelligent Control.

Background technology

Along with the fast development of solar photovoltaic grid-connection generation technology, big-and-middle-sized photo-voltaic power generation station puts into build and uses.Sunlight is array switching for unidirectional current by photovoltaic battery panel, is then connected to the grid by photovoltaic combining inverter.Traditional inverter is all tower machine, and general only a set of power model is in work, as long as inverter is in the state of generating electricity by way of merging two or more grid systems no matter output size, power model can be constantly in load operating conditions, accelerated ageing can reduce service life of equipment.Traditional modular power typically fixes module serial number such as 1-10 module, according to inverter gross output size, carry out progressively start and stop module number, continuous start and stop every day module, it is typically all 1 day every day of module to open at first, No. 1 module is the most finally closed, and does not possess intelligent start/stop polling mechanism, and meeting accelerated ageing reduces the service life of No. 1 module.

Summary of the invention

For problems of the prior art, the invention provides the modularity inverter power control method of a kind of intelligent start/stop polling mechanism, module switch machine is realized Based Intelligent Control, be polled controlling to module work.

The technical solution of the present invention is: the modularity inverter power control method of a kind of intelligent start/stop polling mechanism, including intelligence start, Bye-byes, poll start, poll shutdown；Module switch machine is realized Based Intelligent Control, is polled controlling to module work.

Described intelligence start refers to that system is in the case of input power is continuously increased, PV input power is more than 60% of the module number general power in work, then put into a new module job, so make each module all in a higher efficient point so that overall efficiency also promotes.

Described Bye-byes refer to system in the case of input power constantly reduces, PV input power less than 20% of the module number general power in work, then reduces the module of a job, so makes the total losses of system to reduce.

The start of described poll refers to first module time of running in each input coefficient, a power up sequences number can be started, when guaranteeing first module work in each input coefficient, all select a power up sequences number different from last time, make power up sequences number form a circulation to repeat so that each module can be as the module being put into operation at first.

When the shutdown of described poll refers to the total number of modules amount in minimizing system every time, a power-down sequence number corresponding with power up sequences number can be started, during so making switching on and shutting down, it is ensured that starts shooting at first shuts down the most at first, further such that the working time equalization of module.

The invention has the beneficial effects as follows: intrasystem switch of the power supply module machine is realized Based Intelligent Control, make module be near maximum functional point during unlatching and put into new module, near 20% power points, unnecessary power module is closed during closedown, the system entirety of making realizes intelligent switch machine and controls, the power attenuation that minimizing system is unnecessary, improves system effectiveness；It is polled controlling to the work of intrasystem power module, realize each module and can act as the module that First puts into operation, and can realize each module can act as the pent module of First simultaneously, the equalization of the working time realizing each module the most to greatest extent controls, thus extends the service life of system.

Accompanying drawing explanation

Fig. 1 is intelligence starting procedure figure of the present invention.

Fig. 2 is Bye-byes flow chart of the present invention.

Fig. 3 is poll starting procedure figure of the present invention.

Fig. 4 is poll shutdown process figure of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, by specific embodiment, technical solution of the present invention is described further.

As it is shown in figure 1, Fig. 1 is intelligence starting procedure figure of the present invention.The modularity inverter power control method of the intelligent start/stop polling mechanism of the present embodiment, need to open a new modular power source when input power increases to, module I to be started shooting D process is carried out according to start polling system scheme, then it is issued to the modular power source of correspondence by communication bus, performs corresponding power-on command.

As in figure 2 it is shown, Fig. 2 is Bye-byes flow chart of the present invention.The modularity inverter power control method of the intelligent start/stop polling mechanism of the present embodiment, when input power is reduced to the module that needs to close a work on hand, turn-key system then carries out module I to be shut down D process according to shutdown polling system scheme, then it is issued to the modular power source of correspondence by communication bus, performs corresponding shutdown command.

As it is shown on figure 3, Fig. 3 is poll starting procedure figure of the present invention.The modularity inverter power control method of the intelligent start/stop polling mechanism of the present embodiment, when system proceeds to power generation operation state from off working state every time, all can call a new power up sequences, scope is No. ID between 1-10, start ID sequence each time is different from, in circulation change.Being exemplified below, these No. 2 machines are started working at first, then second module put into subsequently is No. 3, followed by No. 4 ...；Enter power generation operation state from off working state is then that No. 3 modules are started working at first next time, then put into subsequently is No. 4 modules, followed by No. 5 modules.

As shown in Figure 4, Fig. 4 is poll shutdown process figure of the present invention.The modularity inverter power control method of the intelligent start/stop polling mechanism of the present embodiment, when system needs the modular power source quantity reducing work every time, all can call a new power-down sequence, scope is No. ID between 1-10, shutdown ID sequence each time is different from, in circulation change.Being exemplified below, these No. 2 machines are started working at first, then be also that No. 2 machines shut down at first during shutdown, followed by No. 3 ...；Enter power generation operation state from off working state is then that No. 3 modules are started working at first next time, then shut down at first is also No. 3 modules, followed by No. 4 modules, followed by No. 5 modules.

The foregoing is only the preferred embodiments of the invention; not limit the practical range of the present invention, all those skilled in the art with this, use principle and the technical characteristic of the present invention; the various changes made and decoration, within all should being covered by the protection category that the claims is defined.

Claims (1)

1. a modularity inverter power control method for intelligent start/stop polling mechanism, including intelligence start, Bye-byes, poll start, poll shutdown；Module switch machine is realized Based Intelligent Control, is polled controlling to module work；It is characterized in that:

Described intelligence start refers to that system is in the case of input power is continuously increased, PV input power is more than 60% of the module number general power in work, then put into a new module job, module I to be started shooting D process is carried out according to start polling system scheme, then the modular power source of correspondence it is issued to by communication bus, perform corresponding power-on command, so make each module all in a higher efficient point so that overall efficiency also promotes；

Described Bye-byes refers to that system is in the case of input power constantly reduces, PV input power is less than 20% of the module number general power in work, then reduce the module of a job, turn-key system then carries out module I to be shut down D process according to shutdown polling system scheme, then the modular power source of correspondence it is issued to by communication bus, perform corresponding shutdown command, so make the total losses of system to reduce；

The start of described poll refers to first module time of running in each input coefficient, a power up sequences number can be started, when guaranteeing first module work in each input coefficient, all select a power up sequences number different from last time, make power up sequences number form a circulation to repeat so that each module can be as the module being put into operation at first；

When the shutdown of described poll refers to the total number of modules amount in minimizing system every time, a power-down sequence number corresponding with power up sequences number can be started, during so making switching on and shutting down, it is ensured that starts shooting at first shuts down the most at first, further such that the working time equalization of module.