2.标准支路在图4—1所示网络的1支路上,将出现无穷大导纳,在5支路上将出现零导纳,这两种情况都使计算机无法进行运算,必须加以避免,为此我们引进标准支路的概念。我们把上述的支路称为元件支路,即每一个元件构成一个元件支路。标准支路是由元件支路构成,如图4—3所示。它是由非控压力源P_g,非控流量源q_g,受控压力源P_d,受控流 2. Standard Branch There will be an infinite admittance on one branch of the network shown in Figure 4-1 and zero admittance on the five branches, both of which make the computer incapable of operation and must be avoided Here we introduce the concept of standard branch. We refer to the branch as the component branch, that is, each component constitutes a component branch. The standard branch is made up of component branches, as shown in Figure 4-3. It consists of non-controlled pressure source P_g, uncontrolled flow source q_g, controlled pressure source P_d, controlled flow