Logic control system for electrical power transmission network

Claim 1

A SYSTEM FOR CONTROLLING A BREAKER OF AN ELECTRICAL POWER TRANSMISSION NETWORK COMPRISING: (A) A BUS BAR IN A GIVEN SUBSTATION, (B) FIRST, SECOND AND THIRD DISTRIBUTION LINES EACH CONNECTED AT ONE END TO A FIRST, A SECOND OR A THIRD OTHER SUBSTATION, RESPECTIVELY, AND AT THE OTHER END TO SAID BUS BAR, (C) FIRST AND SECOND LINE BREAKERS INTERPOSED BETWEEN SAID BUS BAR AND SAID FIRST AND SECOND LINES, RESPECTIVELY, (D) MEANS FOR DETECTING THE PRESENCE OF AN EXCESSIVE LAGGING PHASE ANGLE OF THE POWER FLOW THROUGH SAID FIRST BREAKER IN A DIRECTION AWAY FROM SAID BUS BAR AND THE ABSENCE OF AN EXCESSIVE LAGGING PHASE ANGLE THROUGH SAID FIRST BREAKER IN THE OTHER DIRECTION AND TO PROVIDE FIRST AND SECOND ELECTRICAL SIGNALS, RESPECTIVELY, UPON THE OCCURRENCE OF SUCH CONDITIONS, (E) MEANS FOR DETECTING THE PRESENCE OF AN EXCESSIVE LAGGING PHASE ANGLE OF THE POWER FLOW THROUGH SAID SECOND BREAKER IN A DIRECTION TOWARD SAID BUS BAR AND TO PROVIDE A THIRD ELECTRICAL SIGNAL INDICATIVE OF SUCH CONDITION, (F) MEANS TO PROVIDE FOURTH AND FIFTH ELECTRICAL SIGNALS AT SAID GIVEN SUBSTATION INDICATIVE OF THE ABSENCE OF EXCESSIVE LAGGING PHASE ANGLES OF POWER FLOW IN DIRECTIONS AWAY FROM SAID GIVEN SUBSTATION AT SAID FIRST AND THIRD SUBSTATIONS IN SAID FIRST AND THIRD LINES, (G) AND CONTROL MEANS IN SAID GIVEN SUBSTATION ADAPTED TO ENERGIZE SAID FIRST BREAKER UPON THE SIMULTANEOUS OCCURRENCE OF SAID SECOND, THIRD, FOURTH AND FIFTH ELECTRICAL SIGNALS.

Claim 2

A SYSTEM FOR CONTROLLING A BREAKER OF AN ELECTRICAL POWER TRANSMISSION NETWORK COMPRISING: (A) A BUS BAR IN A GIVEN SUBSTATION, (B) FIRST, SECOND AND THIRD DISTRIBUTION LINES EACH CONNECTED AT ONE END TO A FIRST, A SECOND OR A THIRD OTHER SUBSTATION, RESPECTIVELY, AND AT THE OTHER END TO SAID BUS BAR, (C) FIRST AND SECOND LINE BREAKERS INTERPOSED BETWEEN SAID BUS BAR AND SAID FIRST AND SECOND LINES, RESPECTIVELY, (D) MEANS FOR DETECTING THE PRESENCE OF AN EXCESSIVE LAGGING PHASE ANGLE OF THE POWER FLOW THROUGH SAID FIRST BREAKER IN A DIRECTION AWAY FROM SAID BUS BAR AND THE ABSENCE OF AN EXCESSIVE LAGGING PHASE ANGLE THROUGH SAID FIRST BREAKER IN THE OTHER DIRECTION AND TO PROVIDE FIRST AND SECOND ELECTRICAL SIGNALS, RESPECTIVELY, UPON THE OCCURRENCE OF SUCH CONDITIONS, (E) MEANS FOR DETECTING THE PRESENCE OF AN EXCESSIVE LAGGING PHASE ANGLE OF THE POWER FLOW THROUGH SAID SECOND BREAKER IN A DIRECTION TOWARD SAID BUS BAR AND TO PROVIDE A THIRD ELECTRICAL SIGNAL INDICATIVE OF SUCH CONDITION, (F) MEANS TO PROVIDE FOURTH AND FIFTH ELECTRICAL SIGNALS AT SAID GIVEN SUBSTATION INDICATIVE OF THE ABSENCE OF EXCESSIVE LAGGING PHASE ANGLES OF POWER FLOW IN DIRECTIONS AWAY FROM SAID GIVEN SUBSTATION AT SAID FIRST AND THIRD SUBSTATIONS IN SAID FIRST AND THIRD LINES, (G) AND CONTROL MEANS IN SAID GIVEN SUBSTATION ADAPTED TO ENERGIZE SAID FIRST BREAKER UPON THE SIMULTANEOUS OCCURRENCE OF SAID SECOND, THIRD, FOURTH AND FIFTH ELECTRICAL SIGNALS.