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Hitachi

Examples of systems analysis projects

Track record in a wide variety of fields

Hitachi has a proven track record of systems analysis over a wide range from power generation to consumption.
Through its experience in creating and operating many power-related systems and pieces of equipment, Hitachi supports power generation infrastructure on a global scale.

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HVDC: High Voltage Direct Current

Examples of systems analysis projects

Our systems analysis service has been adopted by customers in a variety of fields including chemicals, railways, and building management.

Examples of systems analysis projects
No Project Key systems Nature of assessment
1 Assessment of self-commutated converter deployment in a chemical plant Self-commutated converters, generators, and induction motor loads
  • Ensuring power quality
  • Improving reliability of systems
2 Assessment of electric power system stability in a chemical plant Synchronous generators (thermal and hydro), self-commutated converters, power limiting systems
  • Improving system stability through more sophisticated control
  • Curbing capital expenditure by optimizing measures
3 Assessment in power feed systems for traditional railway lines (AC feed section) Power feed systems
  • Results of verifying specification compliance for each stage of analysis
  • Determining reasonable specifications for substations
4 Assessment of power system stability
(Testimonial 1)		 Thermal and hydroelectric power plants, synchronous condensers
  • Ensuring power quality
  • Preventing generator failure
5 Large-scale solar power generation systems
(Testimonials 1 and 2)		 Solar power generation systems
  • Improving system stability through more sophisticated control
  • Curbing capital expenditure by optimizing measures
6 Offshore wind farms Offshore wind power, offshore SS*1, undersea cables
  • Improving reliability of systems
  • Streamlining cable design
7 Electric power systems for high-rise buildings Assessment of standalone operation Synchronous generators (gas turbines, gas engines), DCS*2 systems, induction motor loads
  • Making business decisions based on preliminary evaluation of operational benefits and hedging of risk
8 Assessment of voltage stability in an oil plant (Testimonial 4) Generators, induction motors, phase modulation equipment
  • Suggesting appropriate operation patterns
  • Improving in-plant voltage stability
*1
SS: SubStation
*2
DCS: Distributed Control System

Using systems analysis to deploy private power generation equipment

Testimonial 1

Customer issue
  • The power outage jeopardized the business continuity of our customers.

Nature of
systems analysis
  • Assess stable generator operation and assessing transient phenomena in systems when changing states.
  • Assess standalone operation control using diesel generators and solar power generation.

Hitachi's suggestion
  • An appropriate standalone system based on the results of verifying potential transient phenomena

Customer testimonial
  • We were able to build a standalone system that ensures business continuity planning (BCP).

Using systems analysis to assess deployment of large-scale solar power generation (PV) systems

Testimonial 2

Customer issue
  • When the PV system is used with grid power, we expect variation in its output to introduce voltage fluctuation.

Nature of
systems analysis
  • Assess voltage fluctuations when used with grid power and momentary voltage drops.
  • Assess voltage fluctuation suppression control by means of a power conditioner.

Hitachi's suggestion
  • A PV system that preempts the anticipated risks

Customer testimonial
  • Build a PV system that supplies stable voltage.

Using systems analysis to assess unexpected events that occur when resuming operation of equipment

Testimonial 3

Customer issue
  • When a transformer was connected (the Circuit breaker was turned on), surge current that exceeded the current rating of the system was produced, triggering the protective relay and preventing the equipment from restarting.

Nature of
systems analysis
  • Check reproducibility of situations in which the surge current triggers a protective relay and prevents operation from resuming.
  • Consider using circuit breakers with resistors and taking advantage of the timing with which the transformer is connected.

Hitachi's suggestion
  • Research on unexplained events and suggestions for countermeasures (equipment-based)

Customer testimonial
  • The cause of the surge current was removed, and systems can now be brought back online smoothly and as scheduled.

Using systems analysis to assess operation methods that anticipate regular inspections and accidents

Testimonial 4

Customer issue
  • We don't know how many pieces of our equipment can still operate if one generator shuts down.

Nature of
systems analysis
  • Assess the number of pieces of equipment that can operate with just one generator running (i.e., assessing appropriate operation patterns).
  • Assess procedures for efficiently recovering the upgraded generator.

Hitachi's suggestion
  • Appropriate operation patterns and recovery methods in the event of an accident.

Customer testimonial
  • Loss reduction by determining an appropriate operation pattern and returning rapidly after a generator upgrade