The state estimation code is contributed code (not a part of core MATPOWER), so 
if you don’t get help from others here, I suggest you try contacting the author 
directly.

    Ray


> On Dec 26, 2018, at 11:11 AM, Mohsen Jorjani <m.jorjan...@yahoo.com> wrote:
> 
> Hello
> I have a question regarding state estimation code in matpower. As you know, 
> the system measurements include line power flows, voltage magnitudes and bus 
> power injections. Bus in the code which is provided in matpower (in se folder 
> located under the extras), there is only the possibility to define generated 
> active and reactive power measurement at each bus instead of bus power 
> injection measurements. So consider we are going to define an active power 
> injection measurement(P_inj) of - 20 MW for a PQ bus with active power 
> consumption(P_L) of 18 MW. How should this measurement be define? Should I 
> define a generator in this bus and set the generated power(P_G) of this bus 
> to be -2 MW (Because P_inj= P_G-P_L)? Is that true?
> My other question is about the concept of state estimation. If we have 
> measurements of the sysytem and then replace measurement of  a part of the 
> system such that the new measurements in this part of the system obey KCL and 
> KVL, does the value of residual reduce?



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