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  1. 1. Offering Total Solutions for Every Need Systems are the arteries of any information-oriented society, and it takes expertise in both software and hardware to construct quality systems. Toshiba Corporation, with its advanced technology in the fields of electronics and energy and its depth of experience, can offer comprehensive systems that precisely answer the needs of every customer. As a system organizer, Toshiba aims to be its customer's best partner. Systems for Multiple Purposes Based on its wide technological expertise in control, information, communications and multimedia, Toshiba constructs systems to perform operations ranging from general to multiple purpose in a number of fields. Toshiba demonstrates efficiency and originality in its creation of speedier and more precise multiple-purpose systems that are easy enough for anyone to use. In this period of internationalization, liberalization and diversification of customer needs, Toshiba integrates data to provide high-value-added information, thereby answering society's needs. 1
  2. 2. Thermal Power Generation Thermal Taking advantage of the special characteristics of thermal power generation to maintain a stable supply of electricity, Toshiba is searching for ways that allow energy to support the coexistence of technology and the environment. Toshiba has built up a comprehensive technological base through its century of experience in the electric power field. We supply high-quality electric power systems not only in Japan, but around the world, and we have won a high degree of trust from our customers. We aim to construct energy systems that are even more efficient and environmentally friendly, and in doing so, to contribute to a more enjoyable society. PowerTechnology Power-Generation Systems Technology Technology Information and Control Systems ● Nuclear Power-Generation Systems ● Conventional Power-Generation Systems ● Combined-Cycle Power-Generation Systems ● Geothermal Power-Generation Systems ● Computer ● Communication ● Control ● Multimedia 2
  3. 3. Power-Generation Systems Today's increasingly diverse societies require that power plants be highly efficient, economical, easy to operate, and large capacity. Nuclear-power plants are expected to be the basic power source for large capacities of power, while conventional plants will continue their high level of operation as a mediumcapacity power source. With its decades of experience in powerplant technologies-as well as being a leading integrated manufacturer of electronics, computers and semiconductorsToshiba is uniquely qualified to design and install powergeneration systems to best meet the particular needs of each installation site. Nuclear Power-Generation System Large-capacity output and high reliability are two key requirements for nuclear-power plants. Geothermal Power-Generation System This unique system taps the natural supplies of heat energy that have accumulated inside the earth. Thus, geothermal power is generally considered to be "earth-friendly." 3
  4. 4. Conventional Power-Generation "Conventional" plants are those that burn coal, oil or natural gas to generate power, hence they are called "thermal" power plants. Two key areas where these types of plants must be improved are increased capacities and higher rates of efficiency. Combined-Cycle Power-Generation This is a new type of power-generation system that uses a gas turbine to drive a generator. It also has facilities to recover waste heat from the gas turbine to generate steam and drive a steam turbine. Combined-cycle technology operates at high thermal efficiency, generates large-capacity output, and has excellent operability. Another advantage is that NOx emissions from a gas turbine's exhaust have been reduced to very low levels. Conventional Power Plant This is a common type that burns coal, oil or natural gas to generate steam, which drives a steam turbine. It is generally called a "thermal power plant." Medium-Load Power Supply The type of power supply that regulates power generation according to power demand that varies from season to season or from time to time each day is called a "medium-load power supply," in contrast to a "basic power source" that keeps supplying a constant amount of electric energy throughout the year. 4
  5. 5. Information and Control Systems Achieving a high degree of power-plant reliability is crucial for assuring a steady supply of electricity to the communities and industries a plant serves. The plant's information and control systems provide an integrated interface that is responsible not only for monitoring and controlling its boiler and turbine-generator, but for all other tasks as well, such as data management and technical-service support. Electricity is vital commodity for maintaining and improving our present-day societies and living standards. To ensure adequate, reliable supplies of electric power whenever and wherever needed, Toshiba no", offers a dynamic stream in the 21st century, the TOSMAP-DS, Toshiba Microprocessor Aided Power system control-DS which is state-of-theart Distributed Control System (DCS) developed for the power plant control. To satisfy the social demands, the TOSMAP-DS is featuring: ● Comprehensive integration of plant control ● Open and flexible system ● Easy and Unified Engineering ● Fully independent Human-Machine Interface ● Powerful and reliable controller Toshiba TOSMAP-DS covers a wide range of systems to meet diverse needs-geothermal power plant control, coal fired power plant control, combined cycle power plant control and so on. The TOSMAP-DS serves as a key to provide excellent operability and controllability, high reliability, and easy maintainability for power-plant control. The TOSMAP-DS embodies Toshiba's unrivaled know-how of power-plant control systems accumulated through decades of experience supplying many power plants equipped with the latest electronic technologies. 5
  6. 6. Amenity UserHumanUser-Friendly Human-Machine Interface ━New Operation System for Thermal Power Plants In recent years, the human-machine interface in thermal power plants has become not only the interface between operators and plant equipment, it also is becoming the power station's "face," or moreover, the face of the power company itself. As the contact point between the control system and operators, the human-machine interface is considered a highly important factor of the system concept in developing an advanced information and control system based on the fundamental concept of "human-friendly" technologies. To design an effective human-machine interface, the following factors must be considered. First, the environmental design of the plant's central control room, where operators spend a large part of their working day. Second, the configuration of the human-machine interface equipment located between operators and the system. And third, specifications of the humanmachine functions. Safety Concentration Total Design Concept of Central Control Room To design central control rooms that provide 1) balanced amenities for operator comfort, 2) concentration of necessary control systems, and 3) personnel safety, while concurrently considering complex relationships between humans and their environment, as well as plant management and the machines used for such management the following factors must be considered: ● Environmental design that provides operator's amenities; ● Functional design for achieving operational forms: ● Human-machine interface equipment designed according to ergonomic factors. 6
  7. 7. Advanced Control System for Power Plants 7
  8. 8. 8
  9. 9. Information and Control Engineering Information and control engineering develops a system with a human-machine interface that best meets the customer's requirements for advanced-yet-easy operation of systems. Basic Design of Information and Control Systems The plant's information and control systems are determined based on requirements of mechanical and electrical engineering. The system also represents the needs of the customer, that is, the electric power company. To ensure maximum operational surveillance and ease of operation, a basic system plan is created; the system's configuration is drawn up; the system's inputoutput information is collected; control logic diagrams arc prepared; and the logic of the plant .s automation systems is examined carefully. Such integrated engineering efforts lead to the development of information and control systems that are humanfriendly. 9 Central Control Room Design To achieve the highest levels of surveillance, operability, and operator comfort, the design of a thermal power plant's central control room is carefully examine in coordination with the design staff of Toshiba's head office.
  10. 10. Simulator REPLICA-TYPE SIMULATOR. GENERAL-PURPOSE COMPACT EWS Initial training for newly assigned operators. Refresher training for experienced operators. Enhances operator's ability to carry out appropriate actions under emergency conditions. A suitable tool for testing/licensing operators. FULL SCALE SIMULATOR ● Full-scale simulation of a particular power plant ● Actual-size control panels/desks identical with the plant being simulated (fully realistic operation environment) ● Detailed plant modeling ● DCS part is applied in either of two ways Allow trainees to ascertain the characteristics of a general plant instead of a particular plant. Enables a flexible training schedule depending on individual needs. Suitable for training new company personnel; not only operator's but also technicians, engineers, and even managers. SEMI REPLICA ● Simulation of a particular power plant ● Compact size ● Only a control desk is installed (large-size panels, i.e. auxiliary control panel and back-up panel, are deleted) ● Detailed modeling GeneralGeneral-purpose compact EWS ● A generic model for each type of power plant (Thermal, combined-cycle, etc.) ● Simulation of a plant's overall key features ● Simulation of major emergency conditions ● Compact size with no control panel (Single unix workstation or PC based screen ti ) 10
  11. 11. D-EHC Digital Electro-Hydraulic Control System The D-EHC provides the standard functions that are essential for turbine control. In addition besides, various optional functions can be implemented in the D-EHC according to the client's requirements. If a BFI'-turbine is being used exists, a D-EHC for the BFP-turbine can also be provided. CONTROL FUNNCTIONS MONITORING FUNCTIONS DMAIN TURBINE D-EHC [Standard Functions] TURBINE SPEED CONTROL LOAD CONTROL LOAD LIMITING LINE SPEED MATCHING (LSM) FA/PA VALVE TRANSFER CV CHEST WARMING AUTOMATIC TURBINE START-UP THERMAL STRESS CALCU LATION TURBINE TRIP TEST-TURBINE VALVES -TURBINE OVERSPEED BACK-UP OVERSPEED GOVERNOR The D-EHC's display terminal CRT provides comprehensive informations to the operator for turbine control and monitoring. A color printer (i.e., hard copies) for use with the D-EHC's display terminal is available as an option. [Optional Functions] INITIAL PRESSURE REGULATION (IPR) POWER LOAD UNBALANCE (PLU) EARLY VALVE ACTION (EVA) LOAD LIMIT/REFERENCE FOLLOWER (FLR) VACUUM UNLOADER (VUL) AUTOMATIC FREQUENCY CO NTROL (AFC) (ISOCHRONOUS) AUTOMATIC LOAD REGULATOR (ALR) TURBINE BYPASS VALVE CONTROL Load Control Vibration Monitor 11 System Configuration
  12. 12. Vibration monitoring and Diagnostic system SYSTEM FEATURES Advanced monitoring and logic-based diagnostic functions that have been developed as a result of Toshiba's decades of international experience as a power plant supplier. ● Man-machine interface offers maximum user-friendly features based on the high-resolution, fullcolor, graphic interface of personal computers equipped with the Microsoft Windows operating system. ● Advanced system offers simultaneous monitoring and diagnostic capacity for two powerplant units. ● Combined monitoring of both realtime and historical data ● Constant, automatic storing of system data during diagnosis ● Easy compatible interface with the existing TSI ● Applicable for all types of sensors, gap sensors (one way, two way), onshaft sensors and pedestal sensors ● Interface compatibility with user's existing computer system and DCS. SYSTEM FUNCTIONS MONITORING The system enables easy, intuitive operation of the turbine-generator's sophisticated monitoring functionsdespite any elaborate operating conditions- by user of colorful, highresolution operator terminals and printer-output devices that provide immediate access to real-time on-line and off-line data (e.g., equipment's historical data). Monitoring via operator's terminals can easily he switched between dualshaft and eight-shaft monitoring. PROCESSING OF HISTORICAL DATA Storage of all data recorded under various operating conditions is done automatically, enabling thorough and speedy analysis and diagnosis. ● Start and stops ...Data is stored for the unit's previous 30 starts and stops, at shaft-revolution intervals of 25 rpm. ● Abnormal conditions ...When an abnormal condition occurs, the system records and presents data from 30 minutes before the abnormal event to 30 minutes after, at intervals of 10 seconds. ● Normal operation ...The following plant-system data is accumulated and stored: one day (at 10-second intervals), three weeks (at 1-minute intervals), two years (at 1-day intervals). SYSTEM CONFIGURATION DETECTION OF ABNORMAL VIBRATIONS ● Detection of abnormal vibrations is assured through real-time analysis data such as amplitude level, change rate, vector change rate, and spectrum level. Data for such factors are displayed on operator's terminals. Any abnormal events are simultaneously announced. ● Software maintenance ...Various criteria for fault-detection and diagnosis can be set via system software to better suit the particular needs and parameters of individual power plants. ANALYSIS AND DIAGNOSIS Expert computer and knowledge systems are applied via the system's analysis and diagnostic functions, resulting from Toshiba's decades of experience 1) as a major international supplier of power plants, as well as 2) *1: Assured compatibility with various computer and network systems. an industry-leading manufacturer of *2: All necessary process parameters for high-tech electronics. plant-system monitoring and diagnosis BALANCING SUPPORT The system offers rapid and precise calculations for optimal balancing of the power plant's components and subsystems. ● Automatic calculation of shaft balance weights and alignment angles are output to plant operator terminals. ● After shaft-rotation balance has been optimized, the system calculates vibration conditions to assure that the intended changes produce the intended results. arc input front the DCS via hardwired boards or by electronic transmission (optional) *3: Vibration signals can also be input from a plant's existing turbine supervisory equipment (TSI) However, the plant', exiting system must first be enhanced through installation of a date-processing computer and a vibration-input device. 12
  13. 13. Systems Contributing to Labor-Saving in Local Activities at Thermal Power Stations While automation systems are being widely applied to operations at thermal power stations, the introduction of such systems into local activities, such as patrols and inspections, or special local operations, has not progressed smoothly because these activities require operators and maintenance staff to deal with the particular situations. In line with the needs of its customers, Toshiba has been making continuous efforts to develop systems that contribute to labor-saving in such local activities at thermal power stations, and has joined them as part of the series. Patrol System (PATSYS) PATSYS is designed to support field work for: collecting, editing, and managing (plant) field data. PATSYS consists of: 1) A compact, hand-held terminal for data collection. 2) A high-performance personal computer for data management featuring comprehensive lists and charts. Features ● Compact design system Consists of a hand-held terminal and a personal computer ● Paperless control Requires that patrol staff be equipped only with hand-held terminals ● User-friendly interface ● Optical data transmission Optical transmitting between handheld terminals and personal computers ● Abundant editing functions Lists, charts, correlative analysis ● Patrol reliability 1) Alarm indicators 2) Patrol instructions (e.g., equipment, items, courses) PATSYS Hardware Configuration █ Printer ● used to print data lists, etc. █ Personal computer ● for editing patrol historical data ● for setting patrol courses/items Local Abnormal Condition Detection System █ Optical connecting adapter Hand█ Hand-held terminal ● used to input patrol data Download data Upload data Steam-leak Detection by Image Processing 13 Abnormal Noise Detection by Sound Processing
  14. 14. Computer Systems for Operation and Maintenance Data Management in Thermal Power Stations With the growing number of aged units in thermal power stations and the need to adopt more severe operating conditions to suit changeable load demand, the number of miscellaneous tasks that must be carried out by power station personnel related to operation and maintenance is steeply increasing. In order to maintain highly reliable operation and prolong equipment life, computerization of these tasks is essential to ensure that they are effectively executed. To satisfy these requirements, Toshiba provides a computer system line-up known as the "intensive information integrated system" as part of its advanced information and control system, the TOSMAP-GS series. Historical Data Storage and Management System This system saves the real-time data of thermal power station as a historical database of operation. It is provided with various functions, such as monitoring, of deterioration analysis of plant characteristics, and performance monitoring by calculation of heat balance and efficiency Maintenance System This system saves specification and historical data for plant equipment to support the planning of periodical local patrols and inspections. Intensive information integrated system components in power station computer system 14
  15. 15. Research and Development Today's thermal plants must respond to the diverse and increasing needs of society's power demands. In addition to improved operation panels and central CRT displays to aid safety and efficiency in plant operation, Toshiba researchers are also developing information and control systems based on artificial intelligence (AI) and other new control theories. Scale Model of Central Control Room NextNext-Generation Monitoring and Control Systems The use of a huge, wall-mounted process-flow screens, as well as high-resolution, full-color terminals facilitates maximum operator alertness and responsiveness to the plant's operating conditions. To realize a humanfriendly operational environment, a scale model of the central control room is used to simulate all operator's visibility by CCD camera provided in the mode. 15
  16. 16. AlAl-Computer Support The growing diversity of energy demands requires that thermal power plants be increasingly flexible in their ability to adapt to the need for frequent plant starts and stops. Toshiba has developed an artificial-intelligence operationsupport system that significantly assures rapid, accurate recovery of plant operation in the event that unplanned operational changes or faults occur. The highly flexible yet automatic responses of the AI-based system identify individual problems before they become system faults, thereby enhancing reliability and efficiency of the operation. Application of Advanced Control Theories A range of modern-day control theories such as fuzzy logic, neural networks, and GPC can be applied to nonlinear and multiple input-output systems according to the specific characteristics of a plant's control objectives. Toshiba is constantly conducting research on these and other advanced control systems. Operating Support System Display Prototype Application of Advanced Controls Equipment Diagnosis System Display 16
  17. 17. Engineering Network Toshiba thermal power plants are built by the concerted efforts of its Thermal Power Plant Division and other divisions of Toshiba Corporation, as well as member companies of the Toshiba group. An extensive range of R&D efforts in thermal power engineering is a certain step toward realizing significant technological developments that will constitute the thermal power-generation plants of tomorrow. Head Office (Tsurumi) 17 Head Office (Shibaura) Keihin Product Operation
  18. 18. Toshiba Thermal Power Plants Operating Around the World Operating reliably under the world's widely varying environmental conditions, a total of 203 Toshiba thermal generator units [total capacity as of Sept.1993: 30,081 MW] are serving the industries and homes of many nations around the world. Fuchu Works Hamakawasaki Works 18
  19. 19. TOSHIBA TOSHIBA CORPORATION POWER SYSTEMS AND SERVICES COMPANY 36-5,TSURUMICHUO 4-CHOME, TSURUMI-KU, YOKOHAMA 230-0051 JAPAN FAX: 81-45-500-1592 PHONE: 81-45-500-1553 Overseas Office: Mexico City, Caracas, Rio de Janeiro, Buenos Aires, London, Wien, Berlin, Hong Kong, Bangkok, Manila, Jakarta, Sydney, Wellington, Johannesburg, Beijing Toshiba International Corporation: San Francisco, Houston, Toshiba International Corporation Pty. Ltd.: Sydney Toshiba International Company Limited: London ● For further information, please visit our website at http://www.toshiba.co.jp/index.htm and contact your nearest Toshiba Liaison Representational Operations-Producer Goods. ● The data given in this brochure are subject to change without notice. 3067-5 '99-6 C1