contingency: add option to raise errors if a contingency leads to an …

…error instead of skipping it

pandapower/contingency/contingency.py

@@ -72,6 +72,7 @@ def run_contingency(net, nminus1_cases, pf_options=None, pf_options_nminus1=None
     """
     # set up the dict for results and relevant variables
     # ".get" in case the options have been set in pp.set_user_pf_options:
+    raise_errors = kwargs.get("raise_errors", False)
     if "recycle" in kwargs: kwargs["recycle"] = False  # so that we can be sure it doesn't happen
     if pf_options is None: pf_options = net.user_pf_options.get("pf_options", net.user_pf_options)
     if pf_options_nminus1 is None: pf_options_nminus1 = net.user_pf_options.get("pf_options_nminus1",
@@ -104,6 +105,8 @@ def run_contingency(net, nminus1_cases, pf_options=None, pf_options_nminus1=None
                                             cause_element=element, cause_index=i)
             except Exception as err:
                 logger.error(f"{element} {i} causes {err}")
+                if raise_errors:
+                    raise err
             finally:
                 net[element].at[i, 'in_service'] = True