Dynamic simulation method of security class using Matlab based Matpower toolbox

Generation of system dynamics

The state value of the system is the parameter of each power consumption node .
For example, active power demand can be used alone Pd As a status value .

Personally, I think this assumption is more close to real life , In practical power grid application , Intuitively speaking, the main body with large fluctuation is the power . This fluctuation can set the state transition matrix by itself A（ That is, the way of fluctuation ）, It can also be used that the actual grid load data in the power system database shared by the network , such as

The dynamics of this situation , The state transition matrix cannot be used directly A To embody , It needs to be used Holt Two parameter method .

Of course , Active power value and reactive power value are linked , If the node power factor is assumed to remain constant , The value of node reactive power can be obtained according to the given active power .

Of course, there are other hypothetical methods . This paper uses the total voltage phase angle as the state value , The change of voltage phase angle will inevitably lead to the change of node parameters after power flow calculation .

So we can say , How to use it Matpower This tool has no definite number , How many power node parameters do you need as state values to form a state vector , Just set it up , According to these dynamic changes, the parameters will change after power flow calculation , This leads to changes in the measured values .
As for how to find the relationship between the state value and the measured value , That is, the measurement matrix H？ I feel like Matpower Should be available .

The specific physical relationship between the state value and the measured value is also proposed as follows . It seems that the operation will be very complicated , The method of direct extraction should be used in the program .