Since 1970s, the nonlinear, the instability and theunbalance of the voltage have become more and more serious due to the electronic device and other nonlinear load in power network.

自二十世纪七十年代以来，由于电力电子器件及其它非线性负荷在电网中大量的投入使用，使电网的非线性、不稳定性和不对称性日趋严重。

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It with automatic control theory basis, electronic technology, power electronic technology, the sensor technology, computer technology, network and communication technology as the main tools.

它以自动控制理论为基础，以电子技术、电力电子技术、传感器技术、计算机技术、网络与通信技术为主要工具。

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It is also believed that power electronic technology is able to not only raise and stabilize the controlling voltage, phase Angle and tidal current, but also fast control big power supplying network.

认为电力电子技术不仅可以在高压输电系统中用于提高稳定、控制电压、相角和潮流，也具备了快速控制大电网的能力。

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