The sea for the application of PLC in the photovoltaic power generation

Foreword: photovoltaic power generation is according to the principle of light born v effect, using solar cells convert sunlight directly into electricity. Photovoltaic applications widely, in the field of transportation, communication/communication field, oil, ocean, meteorology and residents living power have their figure, with safe and reliable, no noise, no pollution emission, small power generation efficiency is influenced by environmental temperature, system covers an area of small, high land utilization, etc. Photovoltaic power generation system is general by the solar cell phalanx, battery, charge and discharge controller, inverter, ac power distribution cabinet, solar tracking control system and other equipment. This article will a solar cell phalanx, for example, introduces the application of sea for PLC controller in photovoltaic power generation. Key words: Haiwell ( The sea for) Domestic PLC for H01TCP - sea 4 a smart gateway photovoltaic, solar tracking system principle, trajectory tracking. Because of the relative to a fixed location of solar photovoltaic power generation systems, spring, summer, autumn and winter four seasons in a year, every day to rise the sunset, the sun illumination Angle are changing all the time, if the solar panels can moment is to the sun, power generation efficiency can reach the best state. The current generic sun tracking control system needs to be calculated according to the information such as latitude and longitude point was laid every day of different time of year the sun's Angle, will every moment of the year the sun position is stored in the PLC, which is by calculating the sun position in order to realize the tracking. Sensor tracking. Sensor tracking is to use the light sensor detects whether the sun's rays off panels baseline, when the sun's rays off panels baseline, a deviation signal of sensor signal, the signal amplifying and into a standard signal, through the analog input channel to PLC, PLC after the operation through the switch output control actuators, makes the tracking device to aim at the sun. Second, solar cell phalanx networking introduction 1, a single solar cell phalanx network diagram: ten thousand sets of 2, photovoltaic farms tracker network diagram a photovoltaic farms often have tens of thousands of Taiwan tracker, PLC and H04TCP - sea 4 gateway network is convenient, the multiple solar cell phalanx to the optical fiber Ethernet switch, transmission through Ethernet, can be in the central control room in the tens of thousands of PLC monitoring. Network diagram is as follows: 3 main hardware configuration, system 3. 1 the sea for PLC for PLC hybrid host built-in switch and analog, no. 6 analog input, the range of 0 ~ 10 v, use 12 AD conversion ( General 0 to 20 ma) , support direct access to the light sensor. Host CPU with 2 communication port, can be extended to five communication mouth, each communication port can be programmed and networking and can be used as the main or from the station. Support 1: N, N: 1, the N: N network, support a variety of man-machine interface and configuration software, can with communication function with any third party equipment ( Such as frequency converter, instrument, bar code reader, etc. ) Connected to the Internet. 3. 2 for H01TCP - sea 4 H01TCP - intelligent gateway 4 is a powerful hardware protocol gateway, turn the various protocols of from the device into the standard Modbus RTU or Modbus TCP protocol. Gateway support analog linear transformation, support position function, high and low byte exchange function; Gateway built-in WEB server, the user can through the browser to view real-time change state of data and communication, convenient commissioning; Take four communication serial port 1 Ethernet front-end ports, each communication port with communication. In addition, the intelligent gateway can also on each communication network in the disconnection alarm from machine communication. 3. Three optical fiber Ethernet switch is controlled, the SCADA system. 4 each tracking control principle, system data acquisition which is 1 across the Taiwan strait for PLC, moment receiving sensor was introduced into the sun's rays position signal, through the PLC analog input channel to PLC, after the user program of PLC, the control actuator rotation direction, always keep the solar receiver is the direction of the sun, in order to obtain maximum effective radiation area. A single solar cell phalanx H01TCP - 4, with four communication serial port, a serial port connection to 15 sets of PLC, the data collected in the PLC controller intelligent gateway internal storage, for the use of PC monitoring and communication acquisition. PC can also send control commands, passed to each serial port corresponding PLC intelligent gateway. In addition, multiple solar cell phalanx can be received with optical fiber Ethernet switch, this can be achieved for a solar photovoltaic farms thousands of units of the tracker for centralized control monitoring. 3, 1, sea H01TCP - system advantages 4 only gateway networking capability is strong. With multiple solar cell phalanx can be received on optical fiber Ethernet switch, this can be achieved for a solar photovoltaic farms thousands of units of the tracker for centralized control monitoring. 2, compared with the traditional network, greatly reduce the cost. Using a PLC and a traditional Ethernet module for each tracker data acquisition and monitoring, cost; The sea as H01TCP - 4 only gateway module, a gateway can be monitored more than 60 sets of PLC operation.
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