CN102097817A

CN102097817A - Photovoltaic reverse power controller

Info

Publication number: CN102097817A
Application number: CN201010019247XA
Authority: CN
Inventors: 尹平; 柳宇甡; 钟国永
Original assignee: Zhuhai Singyes Renewable Energy Technology Co Ltd
Current assignee: Zhuhai Singyes Renewable Energy Technology Co Ltd
Priority date: 2010-01-06
Filing date: 2010-01-06
Publication date: 2011-06-15

Abstract

The invention provides a photovoltaic reverse power controller, which is applied to a solar photovoltaic generating system. At present, the conventional anti-reverse current relay in the market does not have the photovoltaic reverse power control function, can only control reverse power within a certain range and cannot ensure the photovoltaic generating system is a reverse current-free system. The photovoltaic reverse power controller receives information acquired and processed by a reverse power acquisition and monitoring system, intelligently controls main loops of the photovoltaic generating system to perform synchronization power generation or stop the synchronization power generation, and keeps the output power of the photovoltaic generating system automatically matched with the load consumed power to realize the reverse power control function. In the figure, an input port receives the information of the reverse power acquisition and monitoring system, and outputs a control command to a photovoltaic sub system after the information is calculated and processed by a singlechip.

Description

Photovoltaic inverse probability controller

Affiliated technical field

The utility model relates to photovoltaic inverse probability control resist technology, is applied to solar photovoltaic generation system.

Background technology

At present, the fast development in domestic solar energy power generating market has proposed new requirement and challenge to solar photovoltaic generation system, and in the present domestic solar energy power generating, the solar photovoltaic generation system most requirement that is incorporated into the power networks is no opposite tide system.Adverse current not occurring in order to ensure photovoltaic generating system send electricity to go into electrical network; photovoltaic system must have anti-reverse current control protective device; this type of device of great majority on the market all is to adopt anti-reverse relay protection; this device can not avoid occurring the inverse probability phenomenon at all; can only be within the specific limits with inverse probability control; and the function that does not have the monitor optical photovoltaic generating system, intelligent degree is low, can not guarantee that photovoltaic generating system is a no opposite tide system.

Summary of the invention

For the power output that solves photovoltaic generating system and the matching problem of load consumption power, prevent that photovoltaic generating system from adverse current occurring and sending electricity to go into electrical network, the present invention solves the technical scheme that this technical problem adopts and is:

1, photovoltaic generating system is divided into several subsystem major loops, each subsystem main road is connected with the load electrical network by photovoltaic inverse probability controller controllable switch.

2, photovoltaic inverse probability controller is according to photovoltaic generating system power output and load consumption power situation, automatically adjust each subsystem major loop controllable switch, being incorporated into the power networks or stopping of control photovoltaic generating system realizes adjusting automatically the power output and the load consumption power of balance photovoltaic generating system.

The inverse probability controller is divided into some separate photovoltaic generation subsystems with photovoltaic generating system; by receiving the computer instruction that monitoring system is sent in the anti-inverse probability control protection system; output signal control photovoltaic generation subsystem input is generated electricity by way of merging two or more grid systems or generation outage, keeps the automatic and load merit consumed power coupling of photovoltaic generating system power output.

Description of drawings

The present invention is further described below in conjunction with accompanying drawing:

Fig. 1 is photovoltaic inverse probability controller principle figure.In Fig. 1, adopt the chip microcontroller Based Intelligent Control, form by power module, single-chip microcomputer, drive circuit, indicating circuit, input port, output port, Extended Capabilities Port, keyboard circuit, input port receives inverse probability collection and detection system information, after the single-chip microcomputer calculation process, by output port output control command.

Fig. 2 is a photovoltaic inverse probability control block wiring diagram.In Fig. 2, the inverse probability controller adopts the full duplex communication transmission by 422 communication cables.

Specific embodiments

Photovoltaic inverse probability controller is installed in the cabinet that is incorporated into the power networks, control being switched on or switched off of master switch of each photovoltaic subsystem major loop, the input that realizes sub-photovoltaic subsystem is incorporated into the power networks and stops to be incorporated into the power networks, and realizes the balance of photovoltaic generating system power and load consumption power.

By photovoltaic generating system power and the load consumption power information of photovoltaic inverse probability controller input port reception by inverse probability acquisition subsystem and monitoring subsystem collection and processing, through the inner specific program calculation process of single-chip microcomputer, send the corresponding signal of order output, the operation or the cut-out of the corresponding photovoltaic subsystem of drive controlling major loop, generated output and the bearing power of adjusting photovoltaic generating system are automatically mated.

Photovoltaic inverse probability controller has full control and two patterns of single control can be selected, and full control is exactly in the three-phase any one when inverse probability occurring mutually, just cuts off being incorporated into the power networks of the whole subsystems of three-phase, detects bearing power again, and each sub-electricity generation system of intelligence coupling puts into operation; Single control is exactly a certain when inverse probability occurring mutually in the three-phase, just cuts off this all sub-electricity generation systems mutually, detects bearing power simultaneously, and each sub-electricity generation system of intelligence coupling puts into operation.

Photovoltaic inverse probability controller has automatically and manual function selecting.Under the automatic mode, the inverse probability controller is adjusted the photovoltaic system generated output in real time according to the bearing power situation; Under the manual mode, artificially connect photovoltaic generating system and generate electricity by way of merging two or more grid systems and stop to be incorporated into the power networks, guarantee maximum generated output.

System performance:

1, photovoltaic reverse power controller adopts single-chip microcomputer control;

2, can to mate inverter unrestricted for photovoltaic reverse power controller;

3, photovoltaic reverse power controller adopts the two-way transmission of full duplex, can realize the communication of 255 sub-inverse probability control stations;

4, each inverse probability control station maximum can be controlled 128 sub-electricity generation systems.

Claims

1. photovoltaic inverse probability controller, it is characterized in that: form by power module, single-chip microcomputer, drive circuit, indicating circuit, input port, output port, Extended Capabilities Port, keyboard circuit, according to photovoltaic generating system power and load consumption power information, each major loop of intelligent selection photovoltaic generating system is incorporated into the power networks or cuts off, automatically adjust photovoltaic subsystem power output and load matched, realize the inverse probability controlled function.

2. photovoltaic inverse probability controller according to claim 1 is characterized in that: photovoltaic inverse probability controller controllable switch is independently controlled and is connected photovoltaic generation subsystem major loop and load electrical network.

3. photovoltaic inverse probability controller according to claim 1, it is characterized in that: photovoltaic inverse probability controller input port receives photovoltaic generating system and load information, through the inner specific program calculation process of single-chip microcomputer, the operation or the cut-out of exporting the corresponding photovoltaic generation subsystem of corresponding signal drive controlling major loop.