Consumer apparatus operation management system and method

• US 9,935,461 B2
• Filed: 02/18/2015
• Issued: 04/03/2018
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Sasaki, Hiroto, Uchiyama, Noriyuki, Tsuyuzaki, Masao
• Primary Examiner(s): Hiltunen, Thomas J
• Application Number:
  US14/624,959
• Publication Number:
  US 20150255982A1
• Time in Patent Office: 1,140 Days
• Field of Search: None
• CPC Class Codes: G06Q 30/04 Billing or invoicing
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/12 for adjusting voltage in ac networks by changing a characteristic of the network load
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 3/28 Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security
• CPC Class Codes: Y04S 50/12 Billing, invoicing, buying or selling transactions or other related activities, e.g. cost or usage evaluation

Abstract

A consumer apparatus operation management system that prepares an operation plan of a consumer control apparatus in a power distribution system includes: an evaluation unit configured to acquire system information including a system topology and impedances in the power distribution system, to predict load amounts and power generation amounts for respective prescribed nodes, to generate a voltage distribution profile indicative of a correlation between a power transmission distance and a voltage transition based on the system information, the load amounts, and the power generation amounts, and to figure out an evaluation value based on a variation width of the voltage distribution profile and a specified voltage width; and a preparation unit configured to prepare an operation plan related to heat quantity control and/or electric-energy control in the consumer control apparatus based on the evaluation value.

Claims

1. A consumer apparatus operation management system that prepares an operation plan of a consumer control apparatus in a power distribution system, the consumer apparatus operation management system comprising:

an evaluation unit configured

to acquire system information including a system topology and impedances in the power distribution system,

to predict load amounts and power generation amounts for respective prescribed nodes,

to generate a voltage distribution profile indicative of a correlation between a power transmission distance and a voltage transition based on the system information, the load amounts, and the power generation amounts, where the voltage distribution profile includes a delivery reference voltage from a substation and node voltage values of the respective nodes, and

to determine an evaluation value based on a variation width of the voltage distribution profile and a specified voltage width; and

a preparation unit configured to prepare an operation plan related to heat quantity control and/or electric-energy control in the consumer control apparatus based on the evaluation value.

2. The consumer apparatus operation management system according to claim 1, wherein the evaluation unit determines the variation width from a difference between a maximum value and a minimum value of voltages at the nodes in the voltage distribution profile.

5. The consumer apparatus operation management system according to claim 1, wherein the evaluation unit further determines evaluation sensitivities indicative of variations of the evaluation value with respect to unit variations of the load amounts for the respective nodes.

6. The consumer apparatus operation management system according to claim 1, wherein the preparation unit varies control amounts of a voltage control apparatus in the power distribution system and/or the consumer control apparatus at the nodes based on the evaluation value and prepares the operation plan.

7. The consumer apparatus operation management system according to claim 6, further comprising:

a market transaction unit configured to conduct transactions with an electricity market;

wherein the preparation unit prepares the operation plan based on adjustment amounts related to demand-and-supply adjustment commands of electric power for the consumer control apparatus, the adjustment amounts being acquired from the market transaction unit.

8. The consumer apparatus operation management system according to claim 6, further comprising:

an operation execution unit configured to generate and output control commands directed to the consumer control apparatus.

9. The consumer apparatus operation management system according to claim 7, further comprising:

an apparatus management unit configured to receive control results of the consumer control apparatus due to the demand-and-supply adjustment commands; and

a fee calculation unit configured to calculate incentives paid to respective consumers based on the control results transmitted from the apparatus management unit.

3. A consumer apparatus operation management system that prepares an operation plan of a consumer control apparatus in a power distribution system, the consumer apparatus operation management system comprising:

an evaluation unit configured

to acquire system information including a system topology and impedances in the power distribution system,

to predict load amounts and power generation amounts for respective prescribed nodes,

to generate a voltage distribution profile indicative of a correlation between a power transmission distance and a voltage transition based on the system information, the load amounts, and the power generation amounts, and

to determine an evaluation value based on a variation width of the voltage distribution profile and a specified voltage width; and

a preparation unit configured to prepare an operation plan related to heat quantity control and/or electric-energy control in the consumer control apparatus based on the evaluation value, wherein the evaluation value is a value acquired by dividing the variation width by the specified voltage width.

4. The consumer apparatus operation management system according to claim 3, wherein the operation plan is prepared based on the voltage distribution profile when the evaluation value becomes smallest.

10. A consumer apparatus operation management method for preparing an operation plan of a consumer control apparatus in a power distribution system, the method comprising the steps of:

acquiring system information including a system topology and impedances in the power distribution system;

predicting load amounts and power generation amounts for respective prescribed nodes;

generating a voltage distribution profile indicative of a correlation between a power transmission distance and a voltage transition based on the system information, the load amounts, and the power generation amounts, where the voltage distribution profile includes a delivery reference voltage from a substation and node voltage values of the respective nodes;

determining an evaluation value based on a variation width of the voltage distribution profile and a specified voltage width; and

preparing the operation plan based on the evaluation value.