Governments and power companies are expected to photovoltaic (PV) power generation will account for a large proportion of their total energy supply in. The DC conversion solar cells is synchronized with the AC grid is designed to have stringent requirements, especially the future. PV inverter must achieve maximum efficiency over a wide power range and operating conditions, and must meet stringent safety requirements. Depending on the final performance of the inverter based power accurately measured. PV inverter manufacturers need to work closely with the sensor manufacturer, to ensure support for the latest trends in photovoltaic technology.

Our world requires use of "green" renewable energy alternatives to fossil fuels to benefit the environment. Forecast for the near future power supply system includes a variety of realistic scenarios of energy, including solar energy has a variety of configurations scale, both covering several hectares of large-scale power plants, but also means single-family use. This will promote the photovoltaic (PV) solar inverter market to grow strongly. Even in the current economic downturn, the PV market is expected to reach $ 34 billion in 2013. About PV market considerations, the newer devices is expected of all sizes will be connected to the grid; single-family home system, even if partial load generating capacity than necessary, but also to the power company transmission and sale of electricity.

PV systems to achieve their full potential, we must improve the efficiency of power generation in order to reduce the cost per kilowatt. As we all know, solar cell manufacturers have been working to improve the efficiency of solar radiation into electricity basis; photovoltaic manufacturers are designing next-generation inverter, increase power and efficiency through increased diagnostic and other functions, increased intelligence and functionality. The latest trend is a multi-string technology: more than the series connected solar cell consisting of series connected to a single inverter, in which each cell has its own maximum power point tracking (MPPT) device, thereby maximizing energy production .

Solar power is not easy to use. The battery is open, the nominal output voltage of about 0.6 volts: typically each solar cell panel up to 72, an open circuit 44 volts. The output level of a battery short-circuit current. At a point between these limits, the battery output voltage and a maximum power current. The maximum power point with the operating conditions (such as the projection of solar radiation) changes, so that the inverter http://www.gridtiepowerinverteronline.com/ must be tracked in order to maintain maximum efficiency point. Designers rely on instantaneous voltage and current sensor data acquisition, software algorithms to do this.

Inverter output current is generally 15 to 50Arm, measured by the sensor to the pulse width modulation (PWM) sine wave output feedback controller, the measurement of power into the grid. The controller is mainly based on a microprocessor or digital signal processors, these processors with +5 volt power supply, working voltage reference shared with other active components of the electronic control system.

The HMS LEM current sensor +5 volt power supply operation. Provide internal reference voltage (2.5 volts) through separate pins, making them easy to use and with a DSP or microprocessor. However, they are also able to withstand these DSP's external reference (between 1.5 to 2.8 volts), which generates its own benchmarks. This makes the entire application more efficient, helping to eliminate errors in the calculation of baseline drift.