首页>
外国专利>
IMPROVEMENTS IN OR RELATING TO DIRECT CURRENT DISTANCE PROTECTION SCHEMES
IMPROVEMENTS IN OR RELATING TO DIRECT CURRENT DISTANCE PROTECTION SCHEMES
展开▼
机译:直接电流距离保护方案的改进或与之有关的改进
展开▼
页面导航
摘要
著录项
相似文献
摘要
In the field of DC electrical power networks there is provided a DC distance protection scheme (10; 60; 80; 90; 100; 110) for protecting a DC power transmission medium (20) within a said DC electrical power network (12). The DC distance protection scheme (10; 60; 80; 90; 100; 110) comprises a protection device (16; 64; 84; 94; 104; 114) that is coupled in use to a DC power transmission medium (20). The protection device (16; 64; 84; 94; 104; 114) is operable to protect the DC power transmission medium (20) from an electrical fault. The DC distance protection scheme (10; 60; 80; 90; 100; 110) also includes a measurement apparatus to selectively measure the current (im) and voltage (um) of the DC power transmission medium (20). In addition the DC distance protection scheme (10; 60; 80; 90; 100; 110) also includes a controller (22, 62; 82, 92, 102, 112) that is programmed to: (i) calculate an operating voltage (Uop) of the DC power transmission medium (20) using the measured current (im) and voltage (Um); (ii) perform a transient comparison between the calculated operating voltage (Uop) and the measured voltage (um); and (iii) operate the protection device (16; 64; 84; 94; 104; 114) to protect the DC power transmission medium (20) if the transient comparison meets a predefined criterion.
展开▼
机译:在DC电力网络领域中,提供了一种DC距离保护方案(10; 60; 80; 90; 100; 110),用于保护所述DC电力网络(12)内的DC电力传输介质(20)。 DC距离保护方案(10; 60; 80; 90; 100; 110)包括保护装置(16; 64; 84; 94; 104; 114),该保护装置在使用中耦合至DC电力传输介质(20)。保护装置(16; 64; 84; 94; 104; 114)可操作以保护DC电力传输介质(20)免受电气故障的影响。直流距离保护方案(10; 60; 80; 90; 100; 110)还包括一个测量设备,可选择性地测量电流(i m Sub>)和电压(u m Sub >)的直流电传输介质(20)。此外,直流距离保护方案(10; 60; 80; 90; 100; 110)还包括控制器(22,62; 82,92,102,112),该控制器被编程为:(i)计算工作电压(使用测得的电流(i m Sub>)和电压(U m Sub>)的直流输电介质(20)的U op Sub>); (ii)在计算出的工作电压(U op Sub>)和测量出的电压(u m Sub>)之间进行瞬态比较; (iii)如果瞬态比较满足预定标准,则操作保护装置(16; 64; 84; 94; 104; 114)以保护DC电力传输介质(20)。
展开▼