CN103795233A

CN103795233A - Modularized inverter power supply control method for intelligent start and stop polling mechanism

Info

Publication number: CN103795233A
Application number: CN201410059238.1A
Authority: CN
Inventors: 张海波; 吴斌; 王兆明; 孙邦伍
Original assignee: NANJING GUANYA POWER EQUIPMENT CO Ltd
Current assignee: NANJING GUANYA POWER EQUIPMENT CO Ltd
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2014-05-14
Anticipated expiration: 2034-02-21
Also published as: CN103795233B

Abstract

The invention discloses a modularized inverter power supply control method for an intelligent start and stop polling mechanism. The method comprises the steps of intelligent starting, intelligent stopping, polling starting and polling stopping. According to the modularized inverter power supply control method for the intelligent start and stop polling mechanism, intelligent control over starting and stopping of power modules in a system is achieved, when the power modules are started, new power modules are connected in around a maximum working point, when the power modules are closed, redundant power modules are closed around a 20% power point, intelligent startup and shutdown control over the integral system is achieved, unnecessary power loss of the system is reduced, and system efficiency is improved. Polling control is carried out on working of the power modules in the system, the facts that each module can serve as a first module to run and each module can serve as a first module to be stopped are achieved, therefore equalization control over the working time of each module can be achieved to the maximum degree, and the service life of the system is prolonged.

Description

A kind of modularization inversion device power control method of intelligent start and stop polling mechanism

Technical field

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

Background technology

Along with the fast development of solar photovoltaic grid-connection generation technology, increasing big-and-middle-sized photo-voltaic power generation station drops into build and uses.Sunlight is converted into direct current by photovoltaic cell plate array, is then connected to the grid by photovoltaic combining inverter.Traditional inverter is all tower machine, generally only has a set of power model in work, as long as inverter is in no matter power output size of the state of generating electricity by way of merging two or more grid systems, power model can, always in load operation state, can accelerated ageing reduce service life of equipment.Traditional modular power generally fixes for example 1-10 module of module serial number, according to inverter gross output size, carry out progressively start and stop module number, every day continuous start and stop module, be all generally 1 day every day module open at first, No. 1 module is also finally closed, and does not possess intelligent start and stop polling mechanism, and meeting accelerated ageing reduces the useful life of No. 1 module.

Summary of the invention

For problems of the prior art, the invention provides a kind of modularization inversion device power control method of intelligent start and stop polling mechanism, module switch machine is realized to Based Intelligent Control, module work is carried out to polling system.

Technical solution of the present invention is: a kind of modularization inversion device power control method of intelligent start and stop polling mechanism, comprises intelligent start, Bye-byes, poll start, poll shutdown; Module switch machine is realized to Based Intelligent Control, module work is carried out to polling system.

Described intelligence start refers to that system is in the ever-increasing situation of input power, PV input power is greater than 60% of module number gross power in work, drop into a new module job, make like this each module in a higher efficient point, overall efficiency is also promoted.

Described Bye-byes refers to that system is in the situation that input power constantly reduces, and PV input power is less than 20% of module number gross power in work, reduces the module of a job, makes like this total losses of system to reduce.

The start of described poll refers to first module time of running in each input coefficient, can start a start sequence number, while guaranteeing that in each input coefficient, first module is worked, all select a start sequence number different from last time, the sequence number that makes to start shooting forms one and is cycled to repeat, and makes each module can be as the module that is put at first operation.

When described poll shutdown refers to the total number of modules amount in each minimizing system, can start one and power-down sequence number corresponding to start sequence number, make like this in a switching on and shutting down process, the also shutdown at first of guaranteeing to start shooting at first, further makes the operating time equalization of module.

The invention has the beneficial effects as follows: intrasystem switch of the power supply module machine is realized to Based Intelligent Control, when unlatching, make module in dropping into new module near maximum functional point, while closing, near 20% power points, close unnecessary power module, make entire system realize the control of intelligent switch machine, the power loss that minimizing system is unnecessary, improves system effectiveness; Intrasystem power module work is carried out to polling system, realize the module that each module can put into operation as First, and can realize each module and can serve as the pent module of First simultaneously, realize so to greatest extent the equalization control of the operating time of each module, thereby extend the useful life of system.

Accompanying drawing explanation

Fig. 1 is the present invention's intelligence start flow chart.

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

Fig. 3 is poll start flow chart of the present invention.

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

Embodiment

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

As shown in Figure 1, Fig. 1 is the present invention's intelligence start flow chart.The modularization inversion device power control method of the intelligent start and stop polling mechanism of the present embodiment, when being increased to, input power need to open a new modular power source, the module I of carrying out starting shooting according to start polling system scheme is processed for No. D, then be issued to corresponding modular power source by communication bus, carry out corresponding power-on command.

As shown in Figure 2, Fig. 2 is Bye-byes flow chart of the present invention.The modularization inversion device power control method of the intelligent start and stop polling mechanism of the present embodiment, when input power reduces to the module that need to close a work on hand, the module I that turn-key system carries out shutting down according to shutdown polling system scheme is processed for No. D, then be issued to corresponding modular power source by communication bus, carry out corresponding shutdown command.

As shown in Figure 3, Fig. 3 is poll start flow chart of the present invention.The modularization inversion device power control method of the intelligent start and stop polling mechanism of the present embodiment, when system proceeds to generating operating state from non operating state at every turn, a new start sequence is called in capital, scope be between 1-10 one No. ID, start ID sequence is each time not identical, in circulation change.Be exemplified below, these No. 2 machines are started working at first, and second module dropping into so is subsequently No. 3, is then No. 4 Enter generating operating state from non operating state is that No. 3 modules are started working at first next time, and what drop into so subsequently is No. 4 modules, is then No. 5 modules.

As shown in Figure 4, Fig. 4 is poll shutdown process figure of the present invention.The modularization inversion device power control method of the intelligent start and stop polling mechanism of the present embodiment, in the time that system need to reduce the modular power source quantity of work at every turn, a new power-down sequence is called in capital, scope be between 1-10 one No. ID, shutdown ID sequence is each time not identical, in circulation change.Be exemplified below, these No. 2 machines are started working at first, are also that No. 2 machines shut down at first while shutdown so, are then No. 3 Enter generating operating state from non operating state is that No. 3 modules are started working at first next time, and shutdown is also No. 3 modules so at first, is then No. 4 modules, is then No. 5 modules.

The foregoing is only the present invention's preferred embodiment; not limit practical range of the present invention with this, all persons that is familiar with technique, use principle of the present invention and technical characterictic; various changes and the decoration done, within all should being covered by the protection category that these claims define.

Claims

1. a modularization inversion device power control method for intelligent start and stop polling mechanism, is characterized in that: comprise intelligent start, Bye-byes, poll start, poll shutdown; Module switch machine is realized to Based Intelligent Control, module work is carried out to polling system.

2. the modularization inversion device power control method of intelligent start and stop polling mechanism according to claim 1, it is characterized in that: described intelligence start refers to that system is in the ever-increasing situation of input power, PV input power is greater than 60% of module number gross power in work, drop into a new module job, make like this each module in a higher efficient point, overall efficiency is also promoted.

3. the modularization inversion device power control method of intelligent start and stop polling mechanism according to claim 1, it is characterized in that: described Bye-byes refers to that system is in the situation that input power constantly reduces, PV input power is less than 20% of module number gross power in work, reduce the module of a job, make like this total losses of system to reduce.

4. the modularization inversion device power control method of intelligent start and stop polling mechanism according to claim 1, it is characterized in that: the start of described poll refers to first module time of running in each input coefficient, can start a start sequence number, while guaranteeing that in each input coefficient, first module is worked, all select a start sequence number different from last time, the sequence number that makes to start shooting forms one and is cycled to repeat, and makes each module can be as the module that is put at first operation.

5. the modularization inversion device power control method of intelligent start and stop polling mechanism according to claim 1, it is characterized in that: when described poll shutdown refers to the total number of modules amount in each minimizing system, can start one and power-down sequence number corresponding to start sequence number, make like this in a switching on and shutting down process, guarantee the also shutdown at first of starting shooting at first, further make the operating time equalization of module.