APPARATUS AND METHOD FOR CONTROLLING AND SIMULATING ELECTRIC POWER SYSTEM
First Claim
1. A system status operation device comprising:
- an information obtaining part to obtain information of power amounts of power flow or reverse power flow in plural customers on service lines branched at plural local power transformers from power line at frequency according to change amount of the power amounts andan operation part to calculate voltage condition at predetermined points on the power line on the basis of the information of the obtained plural power amounts.
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Accused Products
Abstract
A power system power flow simulator includes a power system power flow calculator using load power in local voltage transformers to calculate power flow in power system extending from a transformer substation to local power transformers, customer load imitators which calculate time change of load power used by customers, dispersed power source imitators which calculate time change of power generated by dispersed power sources and a system status manager which manages operation procedure. The system status manager advances processing while supplying a load power request message with time information attached thereto to the customer load imitators and the dispersed power source imitators, and decides time intervals of supply of the load power request message in accordance with the power load temporal change rate calculated by the customer load imitators and the dispersed power source imitators.
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Citations
22 Claims
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1. A system status operation device comprising:
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an information obtaining part to obtain information of power amounts of power flow or reverse power flow in plural customers on service lines branched at plural local power transformers from power line at frequency according to change amount of the power amounts and an operation part to calculate voltage condition at predetermined points on the power line on the basis of the information of the obtained plural power amounts. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system status operation system including a power distribution status operation part and plural transmission parts, wherein
the power distribution status operation part transmits a power amount request message containing time information to the transmission parts and each of the plural transmission parts transmits information of power amount of power flow or reverse power flow in customers on service lines branched at plural power transformers from power line at frequency according to change amount of power amount as power amount message in response to the power amount request message, the power distribution status operation part receiving the power amount message and calculating voltage condition at predetermined points on the power line on the basis of power amount indicated by the received power amount message.
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12. A system controller comprising:
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an information obtaining part to obtain information of power amounts of power flow or reverse power flow in plural customers on service lines branched at plural local power transformers from power line at frequency according to change amount of the power amounts; an operation part to calculate voltage condition at predetermined points on the power line on the basis of the information of the obtained plural power amounts; and a control part to control voltage of the system on the basis of operation result.
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13. A power distribution system power flow simulator which simulates power flow in power distribution system extending from a transformer substation through local power transformers to customer loads, comprising:
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a power distribution system power flow calculator using load power in the local power transformers to calculate power flow of power in power distribution system part extending from the transformer substation to the local power transformers; plural customer load imitators to imitate time change of load power of forward power flow which is power used by plural customers individually; plural dispersed power source imitators to imitate time change of load power of reverse power flow which is power generated by plural dispersed power sources individually; and a system status manager which supplies a load power request message containing time information to the customer load imitators and the dispersed power source imitators and obtains information containing load power at time indicated by the time information from the customer load imitators and the dispersed power source imitators as response information thereto, the system status manager using the obtained load power to calculate load power at plural local power transformers disposed in the power distribution system, the system status manager supplying the calculated load power at local power transformers to the power distribution system power flow calculator to make the power distribution system power flow calculator execute power flow calculation; the customer load imitators and the dispersed power source imitators transmitting information deciding time intervals of supply of the load power request message after next time to the system status manager as response information to the load power request message; the system status manager deciding the time intervals of supply after next time on the basis of information deciding the time intervals of supply. - View Dependent Claims (14, 15, 16, 17)
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18. A system control method comprising:
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obtaining information of power amounts of power flow or reverse power flow in plural customers on service lines branched at plural local power transformers from power line at frequency according to change amount of the power amounts and calculating voltage condition at predetermined points on the power line on the basis of the information of the obtained plural power amounts.
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19. A power distribution system power flow simulation method of simulating power flow in power distribution system extending from a transformer substation through local power transformers to customer loads by computer, wherein
the computer comprises: -
a power distribution system power flow calculator using load power in the local power transformers to calculate power flow of power in power distribution system part extending from the transformer substation to the local power transformers; plural customer load imitators to imitate time change of load power of forward power flow which is power used by plural customers individually; plural dispersed power source imitators to imitate time change of load power of reverse power flow which is power generated by plural dispersed power sources individually; and a system status manager to manage processing in the power distribution system power flow calculator, the customer load imitators and the dispersed power source imitators; and the computer executes, as processing in the system status manager, the following; processing of supplying a load power request message containing time information to the customer load imitators and the dispersed power source imitators; processing of obtaining information containing load power at time indicated by the time information from the customer load imitators and the dispersed power source imitators as response information to the load power request message; processing of calculating load power in plural local power transformers disposed in the power distribution system using the obtained load power; processing of supplying the calculated load power in the local power transformers to the power distribution system power flow calculator; and processing of deciding time intervals of supply of the load power request message after next time on the basis of response information to the load power request message from the customer load imitators and the dispersed power source imitators. - View Dependent Claims (20, 21, 22)
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Specification