摘要
针对“10 kV母线为单母线单分段两段母线且其中一段母线为双分支进线接线方式时,现有的10 kV分段备自投装置不能满足双分支主变变低任一分支运行均可实现分段备自投功能”的问题,提出了一种自适应10 kV母线运行方式的分段备自投方法,通过采集双分支主变变低两分支的电气量、开关量并增加10 kV母线接线方式切换把手以及双分支主变变低开关检修压板,并对现有10 kV分段备自投充、放电逻辑以及动作逻辑进行优化改进,自动适应10 kV母线运行方式,在上述接线方式下双分支主变变低任一分支运行均可实现10 kV两段母线互为暗备用功能。该方法充分发挥采用主变变低双分支接线方式提高供电可靠性的优点,提高了10 kV母线供电可靠性。
When a 10 kV single-bus with two sections and one of the sections has the double-branch incoming lines connection mode,existing 10 kV sectionalized automatic bus transfer device cannot function properly when either of the branch at the low-voltage side of the double-branch main transformer operates. In order to solve this problem, a sectionalized automatic bus transfer method self-adapted to the operation modes of 10 kV bus is proposed. By collecting the electrical quantities and switching values of the two branches at the low voltage side of the double-branch main transformer, adding the switch handle of the 10 kV bus connection mode and the inspection plate of the breakers at the low-voltage side of the transformer, and optimizing the charging and discharging logic and action logic of the existing 10 kV sectionalized automatic bus transfer device to automatically adapt to the 10 kV bus operation mode, the proposed method can achieve the hidden backup function between the two sections of the 10kV buses under the above connection mode and the operation of any branch at the low voltage side of the double-branch main transformer. This method makes full use of the advantage of the enhanced power supply reliability from the application of double-branch connection mode at the low voltage side of main transformer to improve the power supply reliability of the 10 kV bus.
作者
李新海
肖星
罗海鑫
孟晨旭
周恒
LI Xinhai;XIAO Xing;LUO Haixin;MENG Chenxu;ZHOU Heng(Zhongshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangdong Zhongshan 528400,China)
出处
《广西电力》
2022年第4期57-63,共7页
Guangxi Electric Power
基金
广东电网有限责任公司科技项目(GDKJXM20184357)。
关键词
分段备自投
自适应
10
kV母线
双分支主变
供电可靠性
sectionalized automatic bus transfer
self-adaptive
10 kV bus
double-branch main transformer
power supply reliability
