Power Consumption Measuring Device and Power Control System

• US 20070241739A1
• Filed: 07/05/2005
• Published: 10/18/2007
• Est. Priority Date: 07/05/2004
• Status: Active Grant

• Current Assignee: IP Power Systems Corp. (Sumitomo Corporation)
• Original Assignee: IP Power Systems Corp. (Sumitomo Corporation)
• Inventors: Uenou, Yasuhiro, Yano, Tetsuya
• Granted Patent: US 7,502,698 B2
• Time in Patent Office: Days
• US Class Current: 324/76.170
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2816 Controlling appliance services of a home automation network by calling their functionalities arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station; in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom H04Q9/00
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 2012/285 Generic home appliances, e.g. refrigerators
• CPC Class Codes: H04L 67/025 for remote control or remote monitoring of applications
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems
• CPC Class Codes: Y04S 40/18 Network protocols supporting networked applications, e.g. including control of end-device applications over a network

Abstract

A single-phase, 3-wire watthour meter which can measure power consumption, alter a contract capacity, control the stop/start of power supply/distribution, and easily update programs from a higher-level control apparatus by providing a central processing unit, a storing means, a communicating means and various interfaces, can measure, for example, every 0.2 sec, a currents (ia and ib) running through 100V T-phase and R-phase, voltages (v1 and v2) between T-N and between R-N and a current (i3) and a voltage (v3) under a 200V load, determine a 100V power consumption by W100=(ia−i3)·v1+(ib−i3)·v2 and a 200V power consumption by W200=i3·v3, and measure the detailed behavior of a power consumption by totaling a power consumption every 30 min, interlocks with a gas leakage detector and a fire alarm, can control the opening/closing of rain doors and shutters and the operation/stop of Internet home electric appliances, and enables low-cost communication by means of dynamic IP Address-based communication.

Claims

1. A power consumption measuring device, which is provided at each consumer, which has a plurality of CPU for measuring a base voltage and a double-high voltage of power supplied to each consumer through a single phase three-wire and for obtaining total power consumption of each consumer comprising

clocking process for clocking a standard time;

data collection unit time setting process for setting a data collection unit time;

electrical power integration time setting process for setting an electrical power integration time;

first instantaneous electrical power value obtaining process for obtaining a first instantaneous electrical power value w1 consumed at the base voltage at an interval of the data collection unit time;

second instantaneous electrical power value obtaining process for obtaining a second instantaneous electrical power value w2 consumed at the base voltage at an interval of the data collection unit time;

base voltage instantaneous electrical power obtaining process for obtaining a base voltage instantaneous electrical power based on the first instantaneous electrical power value w1 and the second instantaneous electrical power value w2 obtained by the first instantaneous electrical power value obtaining process and the second instantaneous electrical power value obtaining process at an interval of the data collection unit time;

double-high voltage instantaneous electrical power obtaining process for obtaining a double-high voltage instantaneous electrical power at an interval of the data collection unit time;

base voltage watthour obtaining process for obtaining a base voltage watthour based on the base voltage instantaneous electrical power by the base voltage instantaneous electrical power obtained by the base voltage instantaneous electrical power obtaining process and the data collection unit time;

first storing process for string an added value cumulatively added the base voltage watthour obtained by the base voltage watthour obtaining process until the integration time as a base voltage power consumption for an integration time with a standard time and cumulatively added base voltage watthour data;

double-high voltage watthour obtaining process for obtaining a double-high voltage watthour based on the double-high voltage instantaneous electrical power and the data collection unit time;

second storing process for storing an added value cumulatively added the double-high voltage watthour obtained by the double-high voltage watthour obtaining process until the integration time as a double-high voltage power consumption for an integration time with a standard time and cumulatively added double-high voltage watthour data and

watthour data storing term setting process for setting a watthour data storing term for more than predetermined days;

characterized by processing the above processes separately in the plurality of CPU.

2. Two CPUs are provided in the power consumption measuring device according to claim 1,

wherein the clocking process, the data collection unit time setting process, the electrical power integration time setting process, the first instantaneous electrical power value obtaining process, the second instantaneous electrical power value obtaining process, the base voltage instantaneous electrical power obtaining process, the base voltage watthour obtaining process, the first storing process and the watthour data storing term setting process are conducted by one of the CPU;

and the double-high voltage instantaneous electrical power obtaining process, the double-high voltage watthour obtaining process and the second storing process are conducted by the other of the CPU.

3. The power consumption measuring device according to claim 2, wherein hours are divided into plural;

electricity charge for each divided hours are set for the base voltage and the double-high voltage respectively;

and charge calculating process for calculating electricity charge for each hours corresponding to the base voltage and the double-high voltage is conducted by either one of the two CPUs.

4. The power consumption measuring device according to claim 2, wherein

electricity charges for each season are set for the base voltage and the double-high voltage respectively;

and charge calculating process for calculating electricity charge for each seasons corresponding to the base voltage and the double-high voltage is conducted by either one of the two CPUs.

5. The power consumption measuring device according to claim 2, wherein hours are divided into plural;

electricity charge for each divided hours are set for the base voltage and the double-high voltage respectively;

one of the two CPUs conduct charge calculating process for calculating electricity charge corresponding to the base voltage for each hours;

and the other CPU conduct charge calculating process for calculating electricity charge corresponding to the double-high voltage for each hours.

6. The power consumption measuring device according to claim 2, wherein

electricity charges for each season are set for the base voltage and the double-high voltage respectively;

one of the two CPUs conduct charge calculating process for calculating electricity charge corresponding to the base voltage for each hours;

and the other CPU conduct charge calculating process for calculating electricity charge corresponding to the double-high voltage for each hours.

12. The power consumption measuring device according to claim 3, wherein

electricity charges for each season are set for the base voltage and the double-high voltage respectively;

and charge calculating process for calculating electricity charge for each seasons corresponding to the base voltage and the double-high voltage is conducted by either one of the two CPUs.

13. The power consumption measuring device according to claim 3, wherein

electricity charges for each season are set for the base voltage and the double-high voltage respectively;

one of the two CPUs conduct charge calculating process for calculating electricity charge corresponding to the base voltage for each hours;

and the other CPU conduct charge calculating process for calculating electricity charge corresponding to the double-high voltage for each hours.

7. An electrical power control system, comprising a power consumption measuring device, which is provided at each consumer, which has a plurality of CPU for measuring a base voltage and a double-high voltage of power supplied to each consumer through a single phase three-wire and for obtaining total power consumption of each consumer and higher-level control means provided at control point at a remote location, the electrical power control systems and the higher-level control means are connected by a network, wherein:

clocking process for clocking a standard time;

data collection unit time setting process for setting a data collection unit time;

electrical power integration time setting process for setting an electrical power integration time;

first instantaneous electrical power value obtaining process for obtaining a first instantaneous electrical power value w1 consumed at the base voltage at an interval of the data collection unit time;

second instantaneous electrical power value obtaining process for obtaining a second instantaneous electrical power value w2 consumed at the base voltage at an interval of the data collection unit time;

base voltage instantaneous electrical power obtaining process for obtaining a base voltage instantaneous electrical power based on the first instantaneous electrical power value w1 and the second instantaneous electrical power value w2 obtained by the first instantaneous electrical power value obtaining process and the second instantaneous electrical power value obtaining process at an interval of the data collection unit time;

double-high voltage instantaneous electrical power obtaining process for obtaining a double-high voltage instantaneous electrical power at an interval of the data collection unit time;

base voltage watthour obtaining process for obtaining a base voltage watthour based on the base voltage instantaneous electrical power by the base voltage instantaneous electrical power obtained by the base voltage instantaneous electrical power obtaining process and the data collection unit time;

first storing process for string an added value cumulatively added the base voltage watthour obtained by the base voltage watthour obtaining process until the integration time as a base voltage power consumption for an integration time with a standard time and cumulatively added base voltage watthour data;

double-high voltage watthour obtaining process for obtaining a double-high voltage watthour based on the double-high voltage instantaneous electrical power and the data collection unit time;

second storing process for storing an added value cumulatively added the double-high voltage watthour obtained by the double-high voltage watthour obtaining process until the integration time as a double-high voltage power consumption for an integration time with a standard time and cumulatively added double-high voltage watthour data and

watthour data storing term setting process for setting a watthour data storing term for more than predetermined days;

characterized by processing the above processes separately in the plurality of CPU provided in each electric power consumption measuring device.

8. The power control system according to claim 7, wherein two CPUs are provided in the electric power consumption measuring device,

the clocking process, the data collection unit time setting process, the electrical power integration time setting process, the first instantaneous electrical power value obtaining process, the second instantaneous electrical power value obtaining process, the base voltage instantaneous electrical power obtaining process, the base voltage watthour obtaining process, the first storing process and the watthour data storing term setting process are conducted by one of the CPU;

and the double-high voltage instantaneous electrical power obtaining process, the double-high voltage watthour obtaining process and the second storing process are conducted by the other of the CPU.

9. The electrical power control system according to claim 8, wherein:

sending process for sending telemessage to the higher level control means periodically is conducted by either one of two CPUs provided in each electrical power consumption measuring device.

10. The electrical power control system according to claim 9, wherein

the telemessage sent to the higher level control means indicates first and second instantaneous current values ia, ib flowing any of different two lines out of three lines comprising circuit for supplying the basic voltage, third instantaneous current value i3 flowing in circuit for supplying the double-high voltage or total power consumption, or the first through the third instantaneous current values ia, ib, i3 and the total power consumption.

11. The electrical power control system according to claim 8 wherein

wiring for supplying electric power to consumer is made by large capacity beforehand, and

setting process for setting contract capacity by downloading from the higher level control means is conducted by either one of the two CPUs.