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Yoshikawa Y.,Hitachi Ltd. | Tada K.,Information and Telecommunication Systems Company | Furuya S.,Yokohama Research Laboratory | Koda K.,Information and Control Systems Company | Geerli,Global Business Promotion Center
Hitachi Review | Year: 2011

Overview: Successfully combining protection of the global environment with prosperous urban lifestyles that are secure and convenient is an important factor in ensuring the sustainability of cities. The social infrastructure that supports such a city is required not only to establish robust safety and security, it also needs to satisfy criteria such as enhancing urban value by overall optimization and reduction of total cost. To achieve this, parts of the social infrastructure like power, transport, and water which have been optimized independently in the past need to be comprehensively redesigned based on considerations such as environmental performance, customer service level, and operation and maintenance costs. This is one of the prerequisites for achieving what Hitachi calls "next-generation smart cities.".


Watanabe M.,Hitachi Ltd. | Onishi T.,Information and Control Systems Company | Omori T.,Information and Control Systems Company | Terada H.,Yokohama Research Laboratory | Inagaki K.,Hitachi Ltd.
Hitachi Review | Year: 2011

OVERVIEW: How to maintain the quality of electric power on the grid in terms of voltage and other parameters and ensure that equipment operates efficiently will be important considerations if large quantities of solar power generation are to be connected. In response, Hitachi is working on technology development with the aims of introducing equipment such as section switches with built-in sensors and advanced metering infrastructure, developing control equipment, and enhancing monitoring and control. In particular, research and development of SCADA system technologies and voltage control equipment that help maintain power quality on the grid are helping to speed up preliminary investigations into how to maintain power quality and minimize the cost of adapting the grid to cope when large amounts of photovoltaic and other distributed power resources are introduced, thereby helping achieve reductions in CO2 emissions.


Nagura O.,Adjustable Speed Pumped Storage System Development Center | Higuchi M.,Information and Control Systems Company | Oyake T.,Information and Control Systems Company
Hitachi Review | Year: 2010

OVERVIEW: To help prevent global warming, it is anticipated that renewable sources of electric power will provide an increasing proportion of energy needs. Because energy sources such as wind and solar power are dependent on weather conditions, their output can vary widely. Usually, balancing supply and demand for power has been performed by adjusting the generation output in response to varying load, but there is a need to improve the supply and demand balancing functions of existing generation systems to allow the addition of generation capacity produced from renewable energy sources. Hitachi has developed a world-first adjustable-speed pumped-storage generation system that incorporates active-power-based control to provide a power supply and demand balancing function that can operate on time scales from the order of seconds to the order of hours, something that is not possible with conventional systems. It is anticipated that the addition of a large number of adjustable-speed pumped-storage generation systems to the electricity grid will help prevent global warming.


Hashiguchi T.,Information and Control Systems Company | Saito M.,Information and Control Systems Company | Terunuma T.,Hitachi Solutions | Kawahara T.,Information and Control Systems Company
Hitachi Review | Year: 2011

The SCADA and OTS of Electric Power Development Co., Ltd. combines a simulator used for operational training with centralized SCADA system based at three regional control centers that monitor and control the operation of hydro power plants, substations, and converter stations scattered across Japan. The upgrade to this system described here involved the development of a wide-area integrated SCADA system designed to improve availability and flexibility. The system utilizes wide-area IP networking and server virtualization technologies and links the regional control centers and training center together via a wide-area IP network.


Okada A.,Power Systems Company | Nishioka A.,Hitachi Ltd. | Omori T.,Information and Control Systems Company | Yasaka Y.,Hitachi Ltd.
Hitachi Review | Year: 2011

Hitachi, Ltd., Japan, established its new Transmission & Distribution Systems Division in April 2011 to meet the demands for electric power transmission and distribution technologies that delivered new value. Electric power transmission and distribution technologies delivered new value, such as long-distance cross-border transmission system and power system stabilizing solutions that supported the wider adoption of renewable energy. These technologies delivered new value by strengthening coordination with other power system equipment and solutions within the company that helped in maintaining a reliable supply of electric power and delivering these in a way that suited the needs of different communities. The company adopted such a strategy to contribute to creating a sustainable society by responding to the growing global demand for power transmission and distribution technologies.


Komatsu C.,Information and Control Systems Company | Noro J.,Information and Control Systems Company | Kido M.,Information and Control Systems Company | Yoshida S.,Information and Control Systems Company | And 2 more authors.
Hitachi Review | Year: 2011

Protection and control equipment are used to ensure a reliable supply of electric power by detecting abnormal voltage or current levels when lightning strikes or other incidents occur and by signaling circuit breakers to trip, thereby disconnecting the section of the grid containing the fault. In addition to the higher reliability requirement, in view of next generation of technologies, Hitachi developed new generation of digital relays featured with real-time network functions suitable for mission critical protection application, and distributed system configuration applicable for new applications such as wide area protection for maintaining power system stability. Also this new digital relays support unit replacement to prolong the life time of total equipment that is currently in demand from the market.


Osumi H.,Information and Control Systems Company | Nagai S.,Rail Systems Company | Ito M.,Information and Control Systems Company | Kato H.,Yokohama Research Laboratory | Fushiki T.,Hitachi Ltd.
Hitachi Review | Year: 2011

OVERVIEW: Railways play an important role in Japan and the country has well-developed railway services both in its major cities and on inter-city routes. Railway services have evolved in part as a way for people to commute to work or school and mission-critical systems have been implemented to support railway operations and ensure that services are punctual even during the morning and evening rush hours when train operation timetables are particularly busy. Coordination between these mission-critical systems will also be a requirement for the ongoing future development of railway services. We intend to continue contributing to the development of social infrastructure through railway systems by supporting, across different systems and different railway operators, services that provide links to other communities and are part of the social framework through the convergence of information and control technologies we have built up over many years and by strengthening their role in a service platform.


Kokai Y.,Information and Control Systems Company | Fukui C.,Information and Control Systems Company | Kawahara T.,Information and Control Systems Company | Sato Y.,Smart Control
Hitachi Review | Year: 2011

OVERVIEW: As greater use is made of distributed power sources, how to deal with issues such as frequency and voltage fluctuations, fault response, and excess electric power will become increasingly important considerations for the power grid of the future. Hitachi supplies grid control systems that utilize adjustable-speed pumped-storage generation systems, online transient stability control systems, FACTS equipment, and power storage systems to provide solutions for grid stability that are effective for resolving these issues.


Maruyama Y.,Information and Control Systems Company | Kitagawa K.,Information and Control Systems Company | Miura K.,Information and Control Systems Company | Tanaka Y.,Information and Control Systems Company | Yamada T.,Information and Control Systems Company
Hitachi Review | Year: 2011

Hitachi offers environmentally conscious integrated solutions for generating, transmitting, and consuming electric power based around its HIACS Series, which brings together the company's extensive experience and skills in control technology. Hitachi has now developed a new generation of integrated monitoring and control systems for power generation that form the core of these solutions. This development included updating the control panel design and the Hi 3Station program maintenance software as well as controllers, I/O, and other modules. These new products retain the high reliability and performance that are a feature of the current HIACS generation and are designed to deliver superior installation compatibility (compact and adaptable system) and easier maintenance and expansion. Compatibility between generations was also considered to provide a system that is easier to use.


Sato Y.,Information and Control Systems Company | Ito M.,Information and Control Systems Company | Miyatake M.,Information and Control Systems Company
Hitachi Review | Year: 2011

OVERVIEW: The smartcard ticketing systems whose scope is expanding across Japan are now starting to be used not just for public transport ticketing services but also to provide users with an infrastructure that they use in their daily lives including electronic money and mobile services, credit card integration, building access control, and student identification. Hitachi has already contributed to this process through the development and implementation of smartcard ticketing systems for different regions and is now working on the development of systems that support the implementation of smart systems that underpin society and combine information and control to provide new social infrastructure for the foreseeable future.

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