求翻译：在电力系统中变电站变换电压、接受和分配电能、控制电力的流向和调整电压的电力设施，它通过其变压器将各级电压的电网联系起来。变电站的可靠运行，直接关系着工农业生产、人民生活、社会进步。变电站的设计对于确保电网安全、稳定运行，提高供电质量和供电可靠性有着至关重要的作用。是什么意思？

Substations transform the voltage in the power system, receiving and distributing power, and control the flow of electricity and adjust the voltage of electricity facilities through its transformer voltage grid at all levels to link. Reliable operation of the substation is directly related to indust