Abstract: Plural power storage systems 10 are provided in a power system. The power storage systems 10 are connected to a management system 60 via a communication network CN1. The power storage systems each include a power storage device 11, 12, and a control device 100 for controlling the power storage device. The control device stores performance information about the power storage system including the control device, location information indicating a location in the power system of the power storage system including the control device, and order information indicating an order of operation allocated to the power storage system including the control device. When a disturbance occurs in the power system, the control device performs a predetermined compensation operation based on the location information and the order information, and then returns to a preset stand-by state.

Abstract: Plural distributed power storage systems are used to stabilize a power system. Plural power storage systems 10 are provided in a power system. The power storage systems 10 are connected to a management system 60 via a communication network CN1. The power storage systems each include a power storage device 11, 12, and a control device 100 for controlling the power storage device. The control device stores performance information about the power storage system including the control device, location information indicating a location in the power system of the power storage system including the control device, and order information indicating an order of operation allocated to the power storage system including the control device. When a disturbance occurs in the power system, the control device performs a predetermined compensation operation based on the location information and the order information, and then returns to a preset stand-by state.

Abstract: A power supply system is structured, which has a server disposed so that it is capable of communicating through redundant communication media with a user terminal at a user site which is capable of receiving power from one power supply system selected by making a switchover among a plurality of power supply systems; the server collects information about abnormalities caused in the plurality of power supply systems through other redundant communication media from abnormality detectors disposed in a plurality of power generating plants, each of which is part of one of the plurality of power supply systems, and on a plurality of electric transmission/distribution lines, each of which is also part of one of the plurality of power supply systems; the server determines whether the power supply system from which the user is currently receiving power is normal or abnormal; if the power supply system is abnormal, the server sends, to the user terminal, information about normal power supply systems from which the user

Abstract: A power supply system is structured, which has a server disposed so that it is capable of communicating through redundant communication media with a user terminal at a user site which is capable of receiving power from one power supply system selected by making a switchover among a plurality of power supply systems; the server collects information about abnormalities caused in the plurality of power supply systems through other redundant communication media from abnormality detectors disposed in a plurality of power generating plants, each of which is part of one of the plurality of power supply systems, and on a plurality of electric transmission/distribution lines, each of which is also part of one of the plurality of power supply systems; the server determines whether the power supply system from which the user is currently receiving power is normal or abnormal; if the power supply system is abnormal, the server sends, to the user terminal, information about normal power supply systems from which the user

Abstract: A monitoring and control system is provided having a control device, arranged in a central controller room, which provides commands to power distribution panel switch gear located in the field. The switch gear transmits and receives controlling and monitoring signals through wireless communication applying an evanescent mode. The switch gear has a power circuit connected to a plurality of devices to be operated. The switch gear is a panel comprising metal and non-metal surfaces, so that a portion of wireless waves in the evanescent mode travel out of the panel. A receiver is provided for monitoring the wireless waves that travel out of the panel. The wireless signals are compared with information stored in a diagnostics database, and are diagnostically evaluated to determine whether the signals are within a known normal operating range.

Abstract: An information apparatus of a demander is connected via a communication line to an information apparatus of a power company or enterprise. When a power supply contract is signed between the enterprise and the demander, the enterprise presents information of contract (start) periods and information of a unit price of charge for each contract period. According to the information, the demander sets a customized pattern (load pattern) for each desired one of the periods and sends the pattern to the enterprise. The enterprise presents information of charge for the load pattern. The demander determines a power supply contract for the periods. In the operation, the demander collates the load pattern at a present time with a load pattern in a predetermined period in the past and re-sets values of the load pattern at the present time. The enterprise presents information of charge for the load pattern modified and set by the demander.

Abstract: (Subject) Reduction in the size of the apparatus, the minimization of cable laying, and the rationalization of maintenance and diagnosis.

Abstract: (Subject)

Abstract: A firm which executes a power selling business by disclosing information regarding the contents of the business and constructing a power generating equipment will, at the time of starting its business, set securities or equivalent credit granting units according to the evaluated value of grants from individuals, corporations, or other associations which can provide all or part of said factors, obtain a fund by selling such securities or equivalent credit granting units to electricity consumers including companies and individuals who own equipment to consume power in a neighboring area of the power plant to be constructed, and give the discount of charge in a case where power is purchased from such business according to the value available with the securities or equivalent credit granting units, as a privilege given to a purchaser during the holding period of the fund until the fund is redeemed.

Abstract: Minimization of risks to be incurred by a generating plant firm at the time of the firm's non-fulfillment of an agreement for electric power supply which is attributed to an unscheduled shutdown of power generating equipment that supplies electric power to electric power systems. A service center takes an intermediary action for the conclusion of indemnity insurance agreements, in a lump, between a generating plant firm which has power generating equipment and an insurance company, and contracts another indemnity insurance agreement with an electric power company so that a penalty to be incurred at the time of a non-fulfillment of an agreement for electric power supply can be indemnified by the insurance company. Furthermore, the service center subcontracts a maintenance and management service of the power generating equipment, and offers information of operation information and the maintenance status of the power generating equipment to the insurance company for the calculation of insurance premiums.

Abstract: To provide a method of synchronous circuit opening of generator circuit breaker and its control apparatus that can protect a sound generator system of a generator main circuit from a phenomenon that current may not pass through current zero for many cycles. There is provided a construction where a generator exciting current control is incorporated into a control mechanism. In case that an occurrence possibility of a phenomenon that current may not pass through current zero for many cycles can be anticipated, time delay is intentionally caused by timer so as to prevent synchronism of the phenomenon, using an output signal of a generator lock-out relay which covers individual element of an electrical fault causing the phenomenon or in which circuit all those elements are integrated. In case that the phenomenon can be anticipated by calculation, a reactive power output of a generator is increased and consequently AC current amplitude of a sound generator is increased so as to eliminate the phenomenon.

Abstract: An information apparatus of a demander is connected via a communication line to an information apparatus of a power company or enterprise. When a power supply contract is signed between the enterprise and the demander, the enterprise presents information of contract (start) periods and information of a unit price of charge for each contract period. According to the information, the demander sets a customized pattern (load pattern) for each desired one of the periods and sends the pattern to the enterprise. The enterprise presents information of charge for the load pattern. The demander determines a power supply contract for the periods. In the operation, the demander collates the load pattern at a present time with a load pattern in a predetermined period in the past and re-sets values of the load pattern at the present time. The enterprise presents information of charge for the load pattern modified and set by the demander.

Abstract: The object of the invention is to provide an electric power plant and a control apparatus therefor which can obtain an emergency power supply reliably through use of the turbine starter. Another generator different from the main generator coupled to the rotor shaft of the turbine is provided to the input side of the starter via a motor, and a control apparatus is provided for electrically connecting the starter and the generators responsive to a bus voltage from the in-house power supply unit which supplies electricity to a plurality of auxiliary equipment operating in the electric power plant. Thereby, an emergency power supply can be obtained reliably by the simple configuration of the invention without installing emergency power generation facilities such as a diesel engine, gas turbine or the like. In addition, an LCI device which has been utilized only at the time of turbine start up can be utilized advantageously also at the time of emergency when the in-house power supply is lost.

Abstract: A monitoring apparatus for a power plant including a plurality of direct current sources, includes a unit for displaying a predetermined number of symbols representing the direct current sources, and a unit for changing a displayed form of a corresponding symbol when at least one physical quantity of the states of the direct current sources changes.

Abstract: A faulty chemical reactor in a chemical plant is removed, heat exchange is conducted between the faulty chemical reactor and a new chemical reactor with which the faulty chemical reactor is to be replaced, and then the new chemical reactor is installed at the position from which the faulty chemical reactor was previously removed.

Abstract: A consumer load receiving power from a power system is divided into a first load to which power may be interrupted if necessary to reduce demand on the power system, and a second load to which power supply may not be interrupted to reduce demand on the power system. When it is necessary to reduce demand on the power system, the power system sends a load control signal to a controller at the consumer indicating that supply of power to the first load is to be interrupted. In response to the load control signal, the controller interrupts supply of power from the power system to the first load, thereby reducing demand on the power system.

Abstract: A knowledge information generating system including: a fundamental rule storage for making and storing, for each process data to be controlled, another process data relating to the former and the relations between these process data in advance as fundamental rules; a process data input processor for inputting and storing the process data to be controlled; a knowledge information collection necessity decider for detecting that the process data obtained from the process data input processor have changed or deviated from a predetermined relation; a knowledge information editor for fetching the fundamental rules relating to the process data, which are decided to be collected by the knowledge information collection necessity decider, from the fundamental rule storage, to edit the process data on the basis of the relations between the data group stored in the process data input processor and the process data stored in the fundamental rules; and a knowledge data base for storing the knowledge information obtained fr

Abstract: In a plant for which process control is made, a margin of an operation allowable limit for a process variable is variably established according to situations for each apparatus constituting the plant. In addition, allowable upper limits of operation considering a life consumption state and an operation schedule of each apparatus are established for respective apparatus on the basis of a life of the whole plant. The life of each apparatus and the life of the whole plant are controlled with a goal to expire all equipment substantially at the same time by reflecting the allowable operating conditions of the apparatus constituting the plant on the plant control. Therefore, it is possible to realize rational and useful plant operation.

Abstract: There is disclosed a chemical reaction installation in which a number of chemical reaction vessels are arranged efficiently so as to decrease an installation area while keeping a good maintainability. A processing system is provided at the inside, and a multi-story construction is provided, and access for maintenance purposes can be obtained from the side of each floor of the multi-story construction.

Abstract: In an expert system of an operating system e.g. an industrial plant it is desired to input data in the form of relationships between operating parameters of the system to a database. However, if such data are input by inexperienced users, there is the possibility of incorrect data being input. Therefore, a memory stores a plurality of fundamental rules, each being a predetermined relationship between the operating parameters. Then when a datum is input, the fundamental rule(s) corresponding to the operating parameters of the datum are investigated, and the datum is transmitted to the database when each such corresponding fundamental rule is satisfied. In a further development, prevent transmitting datum to a database when each such corresponding fundamental rule is not satisfied.