add station controller

[rbolgaryn]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 41.00000% with 236 lines in your changes missing coverage. Please review.

Project coverage is 76.04%. Comparing base (407c6d5) to head (cd9c6a8).
Report is 41 commits behind head on develop.

Files	Patch %	Lines
...ower/converter/powerfactory/pp_import_functions.py	2.16%	226 Missing ⚠️
pandapower/control/controller/station_control.py	94.04%	10 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2228      +/-   ##
===========================================
- Coverage    76.41%   76.04%   -0.37%     
===========================================
  Files          280      281       +1     
  Lines        32429    32798     +369     
===========================================
+ Hits         24779    24940     +161     
- Misses        7650     7858     +208     

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[vogt31337]

Please provide more description, a test and an entry in the changelog. @rbolgaryn

[SteffenMeinecke]

@rbolgaryn It seems that any documentation is missing.

[rbolgaryn]

this is work in progress still

[pawellytaev]

@rbolgaryn @hilbrich suggestion for BinarySearchControl.control_step()

    def control_step(self, net):
        self._binarysearchcontrol_step(net)

    def _binarysearch_control_step(self, net)
        if not self.in_service:
            return
        if self.output_values_old is None:
            self.output_values_old, self.output_values = self.output_values, self.output_values + 1e-3
        else:
            step_diff = self.diff - self.diff_old
            x = self.output_values - self.diff * (self.output_values - self.output_values_old) / np.where(
                step_diff == 0, 1e-6, step_diff)
            x = x * self.output_values_distribution if isinstance(x, numbers.Number) else sum(
                x) * self.output_values_distribution
            self.output_values_old, self.output_values = self.output_values, x
        write_to_net(net, self.output_element, self.output_element_index, self.output_variable, self.output_values,
                     self.write_flag)

So other controllers can use the Binary Search function when inheriting from BinarySearchController with:

class NewControllerWithBinarySearch(BinarySearchControl):
    def __init__(self, net, in_service, order, level,
                         drop_same_existing_ctrl,
                         matching_params, **kwargs):
        super().__init__(net, in_service=in_service, order=order, level=level,
                         drop_same_existing_ctrl=drop_same_existing_ctrl,
                         matching_params=matching_params, **kwargs)
        # init for NewControllerWithBinarySearch
    def control_step(self, net):
        self._binarysearch_control_step(net)
        
        # use the results from self._binarysearch_control_step

What do you think? This would i.m.o. make the BinarySearchController more usable for other controllers