Control system for limiting the electrical consumption of a distribution network
First Claim
1. A control system for limiting the electrical demand of a distribution network to a maximum predetermined value while regulating the temperature of one or more thermal loads by connecting and disconnecting a number of heating or cooling elements, comprising:
- means for measuring the instantaneous demand of said network;
means for comparing the measured demand of said network to said predetermined maximum value;
means for measuring the instantaneous temperature of each said thermal load;
means for determining, for each said thermal load, the difference between the measured temperature and a precetermined temperature for said load;
means for establishing a proportional relation between said difference and the number of elements in a connected state;
priority decision means for determining action to be taken on the connection or disconnection of a number of said elements in response to information received from said comparing means and said relation establishing means; and
means for connecting or disconnecting said number of said elements in response to a decision derived from said priority decision means.
1 Assignment
0 Petitions
Accused Products
Abstract
The control system permits limiting the electrical demand of a distribution network to a desired maximum value by regulating the temperature of one or more thermal loads with heating or cooling elements; this system includes: means for measuring the instantaneous demand of the network; means for measuring the instantaneous temperature of each of the thermal loads; means for comparing the demand of the network to the desired maximum value; means for comparing the measured temperature to the desired temperature for each of the thermal loads; and means for disconnecting or for connecting in response to the information obtained by the comparison, a fraction of the elements which is proportional to the difference between the measured temperature and the desired temperature.
-
Citations
18 Claims
-
1. A control system for limiting the electrical demand of a distribution network to a maximum predetermined value while regulating the temperature of one or more thermal loads by connecting and disconnecting a number of heating or cooling elements, comprising:
-
means for measuring the instantaneous demand of said network; means for comparing the measured demand of said network to said predetermined maximum value; means for measuring the instantaneous temperature of each said thermal load; means for determining, for each said thermal load, the difference between the measured temperature and a precetermined temperature for said load; means for establishing a proportional relation between said difference and the number of elements in a connected state; priority decision means for determining action to be taken on the connection or disconnection of a number of said elements in response to information received from said comparing means and said relation establishing means; and means for connecting or disconnecting said number of said elements in response to a decision derived from said priority decision means. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12, 16, 17, 18)
-
-
7. L% represents in percent a fraction of the elements connected;
-
8. Δ
- T°
is a temperature range in degrees in which a proportional control of said thermal load is done;
- View Dependent Claims (13)
- T°
-
9. T°
-
a represents the temperature to be maintained for said thermal load; and
- View Dependent Claims (14, 15)
-
a represents the temperature to be maintained for said thermal load; and
-
10. T°
-
i represents the measured temperature of said thermal load;
the straight line generator being approximated by subdividing it in a series of steps associated, one to one, to a heating or cooling element.
-
i represents the measured temperature of said thermal load;
Specification