英文:
Failed to expand block containing connect
问题
我试图建立一个根据温度条件连接的连接，以表示在分层热储罐内工作的温度敏感充电管道，以下是用于读取储罐的几个体积的for循环：
`for i in 2:nSeg loop
if (sensor_T_inflow.T > vol[i].T) and (sensor_T_inflow.T < vol[i-1].T) then
connect(feedPort, vol[i].ports[3])
annotation (Line(points={{-50,-60},{6,-60},{6,
-16},{16,-16}}, color={0,127,255}));
end if;
end for;`
然而，我遇到了错误，例如体积2的错误如下：
未能展开包含连接的块：
if (sensor_T_inflow.T > vol[2].T and sensor_T_inflow.T < vol[1].T) then connect(feedPort, vol[2].ports[3]); end if;
模型包含无效的连接语句。
检查中止。
这可能有一个愚蠢的解决方案，但我已检查了所有我的元素的名称和它们的温度属性，它们与这段代码片段匹配，我确认错误特别来自if条件。这是我的模型 如果您能看一下。
我尝试注释掉条件，检查是成功的，只是我有大约40个变量不平衡的问题。如果您有关于如何解决这些不平衡的建议，我将非常感激。
非常感谢您提前的帮助。
英文:
I´m trying to set a connection with a conditional on the temperature, to represent a temperature-sensible charging pipe that works inside a stratified heat storage tank, with the following for loop reading the several volumes of the tank,
`for i in 2:nSeg loop
if (sensor_T_inflow.T > vol[i].T) and (sensor_T_inflow.T < vol[i-1].T) then
connect(feedPort, vol[i].ports[3])
annotation (Line(points={{-50,-60},{6,-60},{6,
-16},{16,-16}}, color={0,127,255}));
end if;
end for;`
However I get the errors such as this one for the volume 2:
Failed to expand block containing connect:
if (sensor_T_inflow.T > vol[2].T and sensor_T_inflow.T < vol[1].T) then
connect(feedPort, vol[2].ports[3]);
end if;
The model contained invalid connect statements.
Check aborted.
This might have a silly solution but I checked the names of all my elements and their temperature properties and they match with this code snippet, and I confirmed the error comes specially from the if conditional. Here is my model If you could take a look at it.
I tried commenting out the conditional and the check was succesful, only that I have a misbalance of about 40 variables to equations. If you got any advice on how to solve those misbalances I´d be much grateful as well.
Thanks a lot in advance.
答案1
得分: 1
连接语句不得依赖于时间变化的变量。
（技术性说明在 https://specification.modelica.org/master/connectors-and-connections.html#restrictions-of-connections-and-connectors 中排在首位）
一种解决方法是将其转换为阀门组件的数组，并以类似的方式对其进行控制。
英文:
The connect-statements may not depend on time-varying variables.
(The technical statement is first in the list in https://specification.modelica.org/master/connectors-and-connections.html#restrictions-of-connections-and-connectors )
A solution would be to turn that into an array of valve-components, and have them controlled in a similar way.
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