def timeseries_reactive(self):
        """
        Reactive power time series in kvar.

        Parameters
        -----------
        timeseries_reactive : :pandas:`pandas.Seriese<series>`
            Series containing reactive power in kvar.

        Returns
        -------
        :pandas:`pandas.Series<series>` or None
            Series containing reactive power time series in kvar. If it is not
            set it is tried to be retrieved from `generation_reactive_power`
            attribute of global TimeSeries object. If that is not possible
            None is returned.

        """
        if self._timeseries_reactive is None:
            if self.grid.network.timeseries.generation_reactive_power \
                    is not None:
                try:
                    timeseries = \
                        self.grid.network.timeseries.generation_reactive_power[
                            self.type].to_frame('q')
                except (KeyError, TypeError):
                    try:
                        timeseries = \
                            self.grid.network.timeseries.generation_reactive_power[
                                'other'].to_frame('q')
                    except:
                        logger.warning(
                            "No reactive power time series for type {} given. "
                            "Reactive power time series will be calculated from "
                            "assumptions in config files and active power "
                            "timeseries.".format(self.type))
                        return None
                self.power_factor = 'not_applicable'
                self.reactive_power_mode = 'not_applicable'
                return timeseries * self.nominal_capacity
            else:
                return None
        else:
            return self._timeseries_reactive.loc[
                   self.grid.network.timeseries.timeindex, :]