Hydro-Québec TransÉnergie





	Simulation and power facility products

	Products for transmission lines

	Services

Products and services
Services

Vibroacoustic analysis

Vibroacoustic analysis is an innovative technique for detecting problems in transformers equipped with tap changers, which must be checked to avoid a variety of complications. Vibroacoustic analysis can be used to

check a tap changer without removing it from service;
detect a wide range of problems;
produce a clear diagnosis.

This type of analysis can be used to detect problems related to

Braking
Mechanical
Electrical contact
Synchronism
Alignment
Electric arc

For more information:

Normand St-Pierre
Chef Projets, Services spécialisés provinciaux, Hydro-Québec TransÉnergie

1780, boul. Lionel-Boulet, 2e étage
Varennes, Québec, J3X 1S1
Tél.: 450 652-8221
Fax: 450 652-8780
Email: st-pierre.normand@hydro.qc.ca

Technical maintenance audit

Technical audits offer customers a detailed assessment of the condition of their electrical installations. The 21-point evaluation, covering technical, maintenance management and safety aspects, is conducted by an expert from Hydro-Québec TransÉnergie, who prepares a report that includes comments, an action plan and short- and medium-term improvement options. The annual follow-up process is optional.

Oragelect

Oragelect is a real-time lightning detection and localization system. Oragelect can be used in both a preventive and a corrective way on transmission, distribution and telecommunications networks. Thanks to the real-time detection of lightning strikes, it's easy to follow the development of a thunderstorm, to foresee its impacts on the system and to take the appropriate action.

Oragelect data is also used for post-mortem event analysis and the budgeting of new equipment. The territory covered by the Oragelect system used by Hydro-Québec TransÉnergie is broad and includes Québec, the Maritime provinces, New England and Eastern Ontario.

Installation and maintenance of underground and underwater cables

Hydro-Québec TransÉnergie can provide the skilled labor and equipment needed to

install cables of any voltage, including standard and oil-filled cables set in conduits or cable racks, or simply buried;
carry out high-voltage testing, oversheath testing and oversheath surge arrester testing, as well as overall assembly inspection;
undertake all maintenance and repair work for installed cables;
develop a customized maintenance program based on equipment type, condition and age;
treat or regenerate cable oil or other insulation oils in order to extend service life;
provide oil sampling services for cables, joints, terminations and oil reservoirs;
ensure quick replacement of defective components following the failure of a cable, termination or joint.

Live-line work

Live-line work consists of a series of operations allowing the installation or replacement of various pieces of electrical equipment without switching the power off. The objective is to reduce the number of service interruptions and maximize system operation and economic return, while improving the quality of customer service. These techniques can be customized to suit any power system, large or small.

Each project is tailored to the customer's specific requirements. Hydro-Québec TransÉnergie guarantees complete and efficient technology transfer so that customers will then be able to perform their own live-line work.

Methods and Courses
Hydro-Québec TransÉnergie has been sharing its know-how in live-line procedures with Canadian and foreign companies for over 50 years. This form of training provides a quick return on investment because it increases the stability of high- and medium-voltage systems, while maximizing customer satisfaction. Our experts teach various safe and effective live-line operations techniques through an extensive training program based on proven procedures.

Treatment of insulating oil

Deteriorating insulating oil in power transformers and shunt reactors can shorten equipment life and lead to expensive production shutdowns.

To prevent such problems and help independent power system operators achieve cost-effective preventive maintenance of on-load equipment, Hydro-Québec TransÉnergie provides environment-friendly, leading-edge expertise in the treatment of insulating oil, which has proven effective in Hydro-Québec's own transformer substations.

On-site sampling at customer premises (with option of measuring power factors and dielectric strength).
Complete laboratory analysis. Laboratory results augment the data from on-site analyses and confirm the quality of the treatment performed.
Problem identification (diagnostic) and recommendation of possible corrective measures.
On-site treatment of insulating oil for power transformers and shunt reactors.

Equipment repair and overhaul

Over the last 50 years, Hydro-Québec has developed considerable expertise in the electrical and mechanical repair of transmission and distribution equipment from different manufacturers.

Hydro-Québec TransÉnergie has a number of specialized workshops:

CEE — Electrical Maintenance Centre, Trois-Rivières
CERV — Maintenance and Repair Centre, Varennes
CTL — Lévis Recycling Centre

Technical training

Hydro-Québec TransÉnergie offers its customers (large-power customers, independent power producers, manufacturers, engineering companies, contractors, etc.) safety training programs. The following sessions are available:

Introduction to the Code de sécurité des travaux - Substations, lines and generating stations
Introduction to induction phenomena
Grounding practices - Substations and lines
Manufacture, maintenance and storage of grounding devices
Single-line diagrams
Thermite welding
Hoisting equipment
Stick inspection
Nodes and splices
High-altitude work with structural displacement
High-altitude work without structural displacement
Protecting line workers from falls
First aid - Rescue basic
First aid - Steel structures
First aid - Wood structures
Wood pole cutting
Working near live lines
High-altitude first aid - Telecom towers
New operators program

To help our customers manage the technical skills available in their workforce, Hydro-Québec TransÉnergie can provide them with a summary or history of training taken at Hydro-Québec. This will help them determine which of their employees may need particular training or refresher courses.

Technical testing

Using our series resonant field test set or a Hipotronics source, we can verify the dielectric behavior of insulated high-voltage cables, SF₆-insulated shielded substations and any other capacitive device.

The series resonant dielectric test system is essentially composed of the adjustable coil of a high-voltage reactor connected in series to a capacitive load. By varying the gap in the reactor core, the reactor inductance can be adjusted to tune the capacitive load to resonance.