main power net

Thermal Power Station is the second net heat source, the main energy-consuming device is a heat exchanger, circulating pump and fill the secondary network of pumps.

热力站是二级网热源，主要耗能设备是换热器、二级网循环水泵和补水泵。

Nowadays, in the power net structure of our nation, 300mw generate set has become the main set, the problem of how to ensure the safe operation has been confront the theorist and practic workers.

目前，在我国的电网结构中，300 MW火电机组已日益成为骨干，因此，如何保证这些机组的安全运行，是当今的理论工作者和现场实际工作者面临的问题。

Single-phase grounded failure is still the main reason of mine power-net fault.

单相接地故障仍是矿山电网的主要事故形式。