TI 最先进的中央逆变器和微逆变器解决方案

中心议题：
    *  TI中央逆变器解决方案
    *  TI微逆变器解决方案
    *  TI为转换器解决方案
    *  TI电池充电解决方案

在整个光伏发电市场不景气的今天，微逆变器被誉为黑暗中的亮光。它与中央逆变器的区别是：中央逆变器用于将72个串接的太阳能电池面板收集的DC电流转换成电网使用的AC电流，它通常是大规模的商用或家用系统，可产生1KW以上的电力。整串光伏面板的最大功率点跟踪(MPPT)仅在逆变器上完成，它也可能含有继电器以实现与电网的隔离。微逆变器的功能相同，但它仅安装在单个光伏面板上，处理的功率也小很多，典型只有300W。微逆变器的优势是出色的可扩展性，特别适用于那些希望先实现小型带MPPT功能的光伏发电站，以后再扩展的客户。阅读本文了解当今最先进的中央逆变器和微逆变器解决方案。

TI’s comprehensive solar energy harvesting portfolio can deliver the entire solar system solution. A broad selection of analog, power management and microcontroller ICs are targeted at grid-tied central inverters, micro-converters and micro-inverters, as well as off-grid battery charging solutions, to maximize the power point and provide the highest possible system efficiency.

DSP- and ARM®-based MCUs also provide system control and support communication technologies including power line communications (PLC), Ethernet, CAN bus, and low-power RF solutions such as ZigBee®.

A variety of power management ICs can provide auxiliary bias supplies from either the DC or AC power rails.TI’s portfolio of high-performance analog ICs also provideideal front ends for MPPT power sensing and power line communications; isolation to sensitive communications electronics; and relay drivers or power switches for islanding in systems requiring UL1741 compliance.



中央逆变器解决方案

Central, or “traditional”, inverters are centralized power control units that convert DC power from a string of 72-cell solar panels to AC power for use on the electrical utility grid. These are usually large scale commercial or residential systems producing in excess of 1 kW of power. Maximum power point tracking for the entire string is done only at the inverter box, which may also include relays to “island” the solar system from the grid.

微逆变器解决方案

Micro-inverters operate similarly to central inverter systems, but are installed on each individual panel and handle much less power, typically 300 W. Micro-inverters provide the benefit of scalability for those who want to start small, yet have full DC/AC conversion with MPPT, and expand later.



微转换器解决方案

Micro-converters maximize the DC power point of a single solar panel and convert (down or up) the DC voltage to be transported downstream to a centralized AC (grid-tied) inverter. Being located on each panel, these systems are lower power (typ. 300 W) than centralized converters. These are sometimes called “optimizers” because they optimize the power of each panel, increasing the overall efficiency of the system.



离网电池充电解决方案

Off-grid solar power systems often need to charge a battery, or array of battery cells, that provide continuous power to the load when solar energy is no longer present. Often cost sensitive, in order to optimize the size, cost and usable power of the storage elements, off-grid systems also require that the power point be maximized. However, this can be done by employing, lower power and less complex MCUs than grid-tied systems or by employing a simple fixed power point – often set at 76% of VOC. Loads such as LED lighting and motors may require additional power boosting and/or control.