A screening method for critical units of thermal stability and safety in power system
A technology of power system and screening method, applied in computer parts, instruments, character and pattern recognition, etc., can solve problems such as economic loss and achieve the effect of reducing loss
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[0027] A screening method for thermal stability and safety-critical units of a power system, comprising the following steps:
[0028] Step 1. Obtain the upper limit of active output, the lower limit of active output of the system nodes of the specified power system, the impedance value of the line between the system nodes and the upper limit of transmission power. The upper and lower safety limits of the generator nodes are based on the given data of the power plant and the operation of the system The upper and lower limits of the active power of the line nodes are determined according to the parameters of the corresponding grid equipment;
[0029] Step 2. Select any m lines in the actual power grid as the research section, and calculate the active power flow sensitivity of the active output changes of all nodes to the selected m lines. Based on the DC power flow model, the sensitivity of node i to line l is S l-i Calculated as follows:
[0030]
[0031] In the above formu...
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