Source: http://www.google.com/patents/US4707778?dq=6008737
Timestamp: 2016-07-25 11:58:22
Document Index: 597532891

Matched Legal Cases: ['art 1', 'art 1', 'art 2', 'art 2', 'art 2', 'art 2']

Patent US4707778 - Controller for heat power plant - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA master controller receives a load demand and a plurality of plant data from a heat power plant and outputs command signals on at least two of an electric power, a feed water flow rate, a fuel flow rate, an air flow rate and a recirculation gas flow rate of the plant required to achieve the load demand....http://www.google.com/patents/US4707778?utm_source=gb-gplus-sharePatent US4707778 - Controller for heat power plantAdvanced Patent SearchPublication numberUS4707778 APublication typeGrantApplication numberUS 06/752,855Publication dateNov 17, 1987Filing dateJul 8, 1985Priority dateJul 9, 1984Fee statusPaidAlso published asDE3587599D1, DE3587599T2, EP0168019A2, EP0168019A3, EP0168019B1Publication number06752855, 752855, US 4707778 A, US 4707778A, US-A-4707778, US4707778 A, US4707778AInventorsHiroshi Yamada, Michihiro Iioka, Akira Sugano, Atsushi Takita, Seiitsu Nigawara, Masayuki FukaiOriginal AssigneeHitachi, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (4), Non-Patent Citations (7), Referenced by (26), Classifications (7), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetController for heat power plant
US 4707778 AAbstract
1. A controller for a heat power plant comprising:a master controller for receiving a load demand and a plurality of plant data from the heat power plant and producing command signals on at least two of electric power, feed water flow rate, fuel flow rate, air flow rate and recirculation gas flow rate of the plant required to achieve the load demand; a plurality of sub-loop controllers independently provided for respectively receiving said command signals for producing control quantities for controlling control ends in accordance with the command signals; a plurality of drive means provided one for each of the control quantities supplied by the sub-loop controllers; and a plurality of plant data detection means for detecting the plant data and delivering the plant data to said master controller or said sub-loop controllers, said sub-loop controllers including processor means respectively for determining a substitute command signal on the basis of the plant data and issuing the substitute command signal to the sub-loop controllers for producing control quantities when the master controller fails. 2. A controller for a heat power plant according to claim 1 wherein said processor means issues a substitute electric power command signal for achieving a frequency control of electricity.
10. A controller for a heat power plant comprising:a master controller for receiving a load demand and a plurality of plant data from the heat power plant and producing command signals on at least two of electric power, feed water flow rate, fuel flow rate, air flow rate and recirculation gas flow rate of the plant required to achieve the load demand; a plurality of sub-loop controllers independently provided for said command signals respectively for producing control quantity signals for controlling control ends in accordance with the command signals; a plurality of drive means provided for receiving the control quantity signals supplied by the sub-loop controllers respectively; and a plurality of plant data detection means for detecting the plant data and delivering the plant data to said master controller, said drive means including back-up means respectively for determining a substitute control quantity signal and issuing the substitute control quantity signal main control function of its one when the sub-loop controller to the drive means in order to control the control ends when a sub-loop controller fails. Description
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