District heat supply plant controller
First Claim
1. A district heat supply plant controller for controlling operation of a district heat supply plant having a plurality of heat source devices, comprising:
- storage means for storing past actual thermal load values of said district heat supply plant;
prediction means for predicting a thermal load value of a current day with reference to the past actual thermal load values stored in said storage means;
planning means for determining an operation plan of said district heat supply plant on the basis of said thermal load value of the current day predicted by said prediction means, said planning means including genetic algorithm executing means for determining an operation plan of said district heat supply plant by genetic algorithms minimizing objective functions about operation of said heat source devices and for applying genetic algorithms to an individual having rows of genes representing activated and stopped states for each predetermined time unit for each of said heat source device, said planning means further including genetic modification means for selecting rows of genes not satisfying predetermined constraint conditions from said rows of genes manipulated by said genetic algorithm executing means and for modifying states of genes not satisfying the constraint conditions among those contained in the selected rows of genes; and
control means for controlling said heat source devices on the basis of the operation plan of said district heat supply plant determined by said planning means.
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Accused Products
Abstract
A district heat supply plant controller for efficiently and flexibly obtaining operation plans of a district heat supply plant includes a plant operation planning device responsive to a predicted thermal load value for a current day predicted by a thermal load prediction device to determine an operation plan of the district heat supply plant. The plant operation planning device has a genetic algorithm executing device applying genetic algorithms onto an individual having rows of genes representing ON/OFF states in each time unit by 1/0 for each of the heat source devices. In the plant operation planning device, a mathematical programming executing device 4 uses an operation plan obtained by the genetic algorithm executing device 3 as its initial value to determine the operation plan of the district heat supply plant 20.
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Citations
7 Claims
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1. A district heat supply plant controller for controlling operation of a district heat supply plant having a plurality of heat source devices, comprising:
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storage means for storing past actual thermal load values of said district heat supply plant;
prediction means for predicting a thermal load value of a current day with reference to the past actual thermal load values stored in said storage means;
planning means for determining an operation plan of said district heat supply plant on the basis of said thermal load value of the current day predicted by said prediction means, said planning means including genetic algorithm executing means for determining an operation plan of said district heat supply plant by genetic algorithms minimizing objective functions about operation of said heat source devices and for applying genetic algorithms to an individual having rows of genes representing activated and stopped states for each predetermined time unit for each of said heat source device, said planning means further including genetic modification means for selecting rows of genes not satisfying predetermined constraint conditions from said rows of genes manipulated by said genetic algorithm executing means and for modifying states of genes not satisfying the constraint conditions among those contained in the selected rows of genes; and
control means for controlling said heat source devices on the basis of the operation plan of said district heat supply plant determined by said planning means. - View Dependent Claims (2, 3, 7)
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4. A district heat supply plant controller for controlling operation of a district heat supply plant having a plurality of heat source devices, comprising:
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storage means for storing past actual thermal load values of said district heat supply plant;
prediction means for predicting a thermal load value of a current day with reference to the past actual thermal load values stored in said storage means;
planning means for determining an operation plan of said district heat supply plant on the basis of said thermal load value of the current day predicted by said prediction means, said planning means including genetic algorithm executing means for determining an operation plan of said district heat supply plant by genetic algorithms minimizing objective functions about operation of said heat source devices, and mathematical programming executing means for determining an operation plan of said district heat supply plant by mathematical programming, said mathematical programming executing means using said operation plan determined by said genetic algorithm executing means as an initial value to determine said operation plan of said district heat supply plant; and
control means for controlling said heat source devices on the basis of the operation plan of said district heat supply plant determined by said planning means. - View Dependent Claims (5)
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6. A district heat supply plant controller for controlling operation of a district heat supply plant having a plurality of heat source devices, comprising:
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storage means for storing past actual thermal load values of said district heat supply plant;
prediction means for predicting a thermal load value of a current day with reference to the past actual thermal load values stored in said storage means;
planning means for determining an operation plan of said district heat supply plant on the basis of said thermal load value of the current day predicted by said prediction means, said planning means including genetic algorithm executing means for determining an operation plan of said district heat supply plant by genetic algorithms minimizing objective functions about operation of said heat source devices, mathematical programming executing means for determining an operation plan of said district heat supply plant by mathematical programming, and selecting means for selecting one of said operation plan determined by said genetic algorithm executing means and said operation plan determined by said mathematical programming executing means; and
control means for controlling said heat source devices on the basis of the operation plan of said district heat supply plant determined by said planning means.
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Specification