<PAGE>   1
                                                                  EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.

         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                      /s/  Stephen E. Ewing
                                                      ---------------------
                                                           Stephen E. Ewing







<PAGE>   2






                                                                 EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                     /s/ William K. McCrackin
                                                     --------------------------
                                                         William K. McCrackin





<PAGE>   3




                                                                  EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                            /s/ Roger Fridholm
                                                            --------------------
                                                                Roger Fridholm





<PAGE>   4





                                                                EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.




                                                        /s/ Frank M. Hennessey
                                                        ------------------------
                                                            Frank M. Hennessey





<PAGE>   5





                                                                  EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                         /s/ Thomas H. Jeffs II
                                                         -----------------------
                                                             Thomas H. Jeffs II





<PAGE>   6






                                                                EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                          /s/ Bill M. Thompson
                                                          ----------------------
                                                              Bill M. Thompson





<PAGE>   7






                                                                 EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.

         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                          /s/ Dale A. Johnson
                                                          ----------------------
                                                              Dale A. Johnson





<PAGE>   8





                                                                 EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, her true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in her name and on her behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                        /s/ Helen O. Petrauskas
                                                        ------------------------
                                                            Helen O. Petrauskas








<PAGE>   9



                                                             EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III,
Daniel L. Schiffer and Harold Gardner, and each of them, his true and lawful
attorneys and agents, each with full power and authority (acting alone and
without the others) to execute in his name and on his behalf and to file with
the Securities and Exchange Commission an Annual Report on Form 10-K for the
year ended December 31, 1997, including all amendments.


         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                            /s/ Howard F. Sims 
                                                            --------------------
                                                                Howard F. Sims 



<PAGE>   10




                                                                 EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Alfred R. Glancy III
and Daniel L. Schiffer, and each of them, his true and lawful attorneys and
agents, each with full power and authority (acting alone and without the other)
to execute in his name and on his behalf and to file with the Securities and
Exchange Commission an Annual Report on Form 10-K for the year ended December
31, 1997, including all amendments.

         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                            /s/ Harold Gardner
                                                            --------------------
                                                                Harold Gardner






<PAGE>   11







                                                               EXHIBIT 24.1

                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned Director or Officer of MCN Energy Group Inc., a
Michigan corporation, does hereby constitute and appoint, Daniel L. Schiffer and
Harold Gardner, and each of them, his true and lawful attorneys and agents, each
with full power and authority (acting alone and without the other) to execute in
his name and on his behalf and to file with the Securities and Exchange
Commission an Annual Report on Form 10-K for the year ended December 31, 1997,
including all amendments.

         IN WITNESS WHEREOF, I have executed this Power of Attorney this 25th
day of February, 1998.



                                                      /s/ Alfred R. Glancy III
                                                      --------------------------
                                                          Alfred R. Glancy III