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发电厂中的直流电源是厂内的控制、保护、自动、通信等装置以及事故照明、汽轮机直流油泵的供电系统,因直接关系着电厂能否安全正常运行,因此要求绝对可靠。电厂直流供电系统主要由充电设备、蓄电池组、稳压装置、逆变装置、输电电缆等构成。一般上述设备安放的地方相对集中,维护起来也较方便,唯输电电缆铺设的距离较远,且大都是埋在地下,维护起来相当麻烦,加上天长日久,侵蚀霉变、虫咬鼠啃等因素都会使这些电缆的绝缘强度下降甚至漏电短路。出现上述情况时,轻者直流供电系统运转不正常,重者则导致系统破坏而整个电厂停转。因此对电厂直流供电系统绝缘参数的测定就显得尤为重要。如何
The DC power supply in the power plant is the control, protection, automatic, communication and other devices of the plant and the accident lighting. The power supply system of the turbine DC pump is absolutely reliable because of the direct and safe operation of the power plant. Power plant DC power supply system mainly by the charging equipment, batteries, voltage regulator, inverter, transmission cables and other components. In general, the above equipment is relatively concentrated and is more convenient for maintenance. Only when the transmission cables are laid are far away from each other, most of them are buried in the ground and are very troublesome to maintain. Coupling with the factors such as eternal mold, Will make these cables reduce the dielectric strength and even short circuit leakage. Occurrence of the above situation, the light DC power supply system is not functioning properly, the heavy cause the system is destroyed and the entire power plant stalls. Therefore, it is very important to measure the insulation parameters of DC power supply system in power plant. how is it