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The road from the idea to implementation of the project was long and full of challenges.

In 2012, VARNA MUNICIPALITY applied for financing under project line for financing or co-financing from the “Kozloduy” international fund (KIF) 2010-2013, Measure 5 – High-priority project line for energy efficient municipal street lighting.
KIF is created with Frame agreement between the European Reconstruction and development bank and the Republic of Bulgaria of 2001, with the aim to manage gratuitous aid provided by the EU for reduction of the effects of preliminary decommissioning of Units 1-4 of the “Kozloduy” Atomic power station.
In this connection, the team of Assoc. Prof. Dr. Eng. D. MATEV was assigned with the project in the form of “INTELLIGENT STREET LIGHTING OF VARNA 2012 – expanded working pilot project”.
Only 14 of 36 project proposals were approved, and the city of VARNA got a prestigious ranking.
As a result, the project proposal of VARNA MUNICIPALITY was approved for gratuitous financing amounting to EUR 1,804,000.00.
The contractor selection procedures and nationwide preparation activities were extensive and in reality project implementation began in 2015.

As in the waiting period technology had received new development and became available both worldwide and in Bulgaria, the team proposed, and VARNA MUNICIPALITY and the contractor agreed, the design solution to be improved.

So the latest version of the project developed by the team and implemented so far was born: “INTELLIGENT STREET LIGHTING OF VARNA 2015” – an important part of implementing the European policy for sustainable urban development and creation of Smart Cities.

I. PROJECT AIM

Development of an intelligent street lighting system with full monitoring and management at individual luminaire level, for the main traffic arteries of the city of Varna and all first-class transport arteries of the national road network on the territory of the city.

II. PROJECT MEASURES

1. Reduction of total electricity consumption. Reduction of expenses on consumed electricity and greenhouse emissions.

2. Improvement of operating management, reduction of operating expenses, increasing reliability of street lighting within the project scope.

3. Significant reduction of the time needed to locate breakdowns in street lighting and their repair.

4. Improved safety of street traffic during the dark part of day by fulfilling the requirements of BDS EN 13201-2 for a lighting environment, applying a system for automated management of street lighting.

5. Improved quality and comfort of the light environment.

III. PROJECT SCOPE

The project encompasses the city’s main traffic arteries:

• Diagonal: Varna Airport – Center (Cathedral), Center (Cathedral) – “Sunny day” resort, Center (Cathedral) – “Hr. Botev” blvd., Center (Cathedral) – “Osmi Primorski Polk” blvd. (up to “Hr. Smirnenski” blvd.).

• Longitudinal: ” V. Levski” blvd., “Tsar Osvoboditel” blvd. (up to “Republika” blvd.), “Slivnitsa” blvd. (up to “Ya. Huniyadi” blvd.).

• Transversal: ” Republika” blvd.

• Circular: “Devnya” str. (up to “Republika” blvd.), “Primorski” blvd., “Knyaz Boris I” blvd. (Southeastern arc).

• The project includes all first-class transport arteries in the national road network passing through the city of Varna: A2 (“Hemus” highway), A5 and E87.

IV. TECHNICAL CHARACTERISTICS

1. The project concept takes into account the infrastructure and specifics of the city of Varna. Technologies and components guaranteeing high quality and reliability of the luminaires, management devices, communication environment, software support and network security are used for the development of intelligent street lighting.

2. Maximum usability is achieved for the parts of existing street lighting installation without management (poles, consoles, cable network, electrical power switchboards, etc. having a significant operating resource), without needing to dismantle and subsequently restore road and sidewalk coverage, while having the opportunity to implement new components with a long operating life.

3. 3912 high-pressure sodium (HPS) luminaires are replaces with 2736 intelligent LED luminaires.

4. 1560 existing single consoles for street light poles are preserved and 1176 double ones are replaced (or transformed) with single ones.

5. Electrical power switchboards within the project scope are 96 and are partially renovated.

6. An advanced communication and management technology is used.

7. Software and hardware support of intelligent street lighting is developed as an open system, with an option to cover the entire city’s needs at a next period of time.

V. ECONOMIC INDICATORS

1. Annual electricity savings for the project scope (with lighting scenarios), compared to the lighting installation without management subjected to reconstruction (with HPS lamps) are at 2348 MWh or 77,7%.

2. Operating expenses for servicing of the street lighting installation are expected to drop 50% for the project scope and 15% for the entire city.

3. Thanks to the technologies used, losses along electricity transmission network and system equipment are reduced by 14%.

4. Total annual savings of electricity costs for the project scope (with lighting scenarios) are estimated at BGN 240,000.

VI. ECOLOGICAL EFFECT

1. The estimated reduction of harmful emissions is:

• CO2: 2700 t/y,

• SO2: 320 t/y.

2. Application of advanced technological solutions allows the reduction of the quantity of heavy metals used in manufacturing and recycling of components applied in the managed lighting installation within the project scope.

PRODUCTS AND TECHNOLOGIES USED IN THE PROJECT

1. Intelligent LED luminaires

2736 of the latest intelligent LED luminaires are applied in the project solution:

Model 1: LED-HB/NW, 25000 lm
Quantity: 348 units.

The model is intended for traffic arteries with high requirements for the light environment. It is used for lighting of:
• part of highway Varna Airport – “Vl. Varnenchik” blvd.
• “Vl. Varnenchik” blvd.
• “Knyaz Boris I” blvd.
• Piccadilly park – “Golden sands” resort
• square in front of Cathedral “Dormition of the Mother of God Cathedral”

The following built-in technologies are used:
– optical system is constructed from highly efficient lenses fixed in a frame with high reflective index. Thus, an optimal LOR factor (Light Output Ratio ~92%) is achieved, complying with the requirements of ME, CE and S light classes and the road/street geometry in different countries
– Luminaires can be programmed to maintain a constant, pre-defined LED’s luminous flux during its life cycle (by increasing the operating current to compensate the reduction of luminous flux in time).
Overlighting in the initial working period of the lighting installation is also eliminated, achieving additional savings of up to 35%
– A tool that allows fine-tuning of the parameters of LED modules (luminous flux, power, etc.), in order to adapt the luminaire to the requirements of each specific lighting installation to increase energy efficiency and reduce operating expenses

Model 2: LED, 72W, 8700 lm
Quantity: 1734 units.

The model has built-in Plug & Play functionality and is intended for the traffic arteries with normal requirements to the light environment:
• “Vl. Varnenchik” blvd.
• “Knyaz Boris I” blvd.
• “Vasil Levski” blvd.
• “Osmi Primorski Polk” blvd.
• “Primorski” blvd.
• “Republika” blvd.
• “Slivnitsa” blvd.
• “Tsar Osvoboditel” blvd.
• Cathedral – “Asparuhovo” residential district
• “Hristo Smirnenski” str.
• “Alexander Rachinski” str.
• “Devnya” str.

The majority of luminaires in the project are of this model.

Model 3: LED, 110W, 13000 lm
Quantity: 654 units.

The model is intended for traffic arteries with higher requirements to the light environment and has a built-in Plug & Play functionality:

• Piccadilly park – “Golden sands” resort
• “Vasil Levski” blvd.
• “Osmi Primorski Polk” blvd.
• Railway station – square

The model completes the range of used luminaires and reduces the cost of the project solution.

Street Lighting Management Software

The ecosystem is a complete solution providing information on all processes by connecting the lighting installation to management and control applications.
The software solution based on cloud services has an intuitive interface, is user-friendly and offers reliability, expandability and security.

It provides flexible management of the lighting installation, even with lighting units of other manufacturers, via a user-friendly interface.
Full control over the lighting installation is implemented, including a detailed analysis of system activities, monitoring and reporting of electricity consumption.
Main functions are:

• Remote control at single luminaire level or luminaires groups.
• GIS – navigation on the territory scope of the street lighting installation.
• Detection and notification of issues.
• Lighting scenarios.
• Measuring electricity consumption.

Advantages of implementing the lighting management software:

• Accurate measurement of consumed electricity
• Complete transparency of operating control
• Exceptional flexibility to achieve the desired light environment
• Increased level of security for citizens and vehicles
• Improved system servicing
• Energy savings

The benefits of implementing “INTELLIGENT STREET LIGHTING OF VARNA” 2015 for the city and the people are multiple and can be viewed as direct ones and those with a multiplication effect.

DIRECT BENEFITS

1. Maximum usability is achieved for the parts of existing street lighting installation without telemanagement, without dismantling and subsequently restoring road and sidewalk coverage, as well as an opportunity to implement new components with a long operating life.

2. Reduced overall energy consumption. Reduced expenses on consumed electricity.
The electricity savings for the project scope (with lighting scenarios) are 78%. The estimated annual savings of electricity expenses amount to BGN 240,000.

3. Improved operating management. Expenses for servicing of the street lighting installation are expected to drop 50% for the project scope and 15% for the entire city.
Significant reduction of the time needed to locate breakdowns in and their repair.
14% reduction in losses in the electricity transmission network and improved reliability of street lighting within the project scope.

4. The project has a pronounced environmental effect. “Saved” carbon emissions are over 3,000 t/y.

5. Safety of street traffic during the dark part of day is improved by fulfilling the requirements of BDS EN 13201-2 for lighting environment, applying a system for telemanagement of street lighting.


luci-association

VARNA Municipality presented Republic of Bulgaria with the project:

“INTELLIGENT STREET LIGHTING OF VARNA 2015 – way to SmartCity”

MULTIPLICATION EFFECT

1. VARNA MUNICIPALITY envisages a gradual inclusion of the remaining gathering and internal streets in city quarters both in the central part of the city and in the residential districts into the “INTELLIGENT STREET LIGHTING OF VARNA”, preserving the type of equipment and used technologies in accordance with the pilot project already implemented.
Installed capacity outside the project scope located in these territories is 78% of the city total.
This way, by unifying the street lighting installation facilities and software platform, the city of VARNA creates a mandatory basis for a SmartCity.
Software and hardware support of intelligent street lighting are an open system, with an option to cover the entire city’s needs at a next period of time.

2. Improved urban infrastructure and safety of the citizens and guests of the city of VARNA.
The system will reduce the number of traffic accidents and the criminal activity on the territory of the entire city.

3. Population dynamics.
Varna is a sea capital of the country and one of the largest seaside resorts, with a constant population of over 395,000 citizens.
Hundreds of thousands of tourists from all over the world stay in the resort hotels every year.
The tourist season attracts some 50,000 – 100,000 workers from all over the country.
The estimated population growth in 2020 is 477,000 citizens. The number of citizens nearly doubles during the active tourist season.

4. Improved quality of public services.
The project encompasses the main traffic arteries of the city, where the population is provided the “street lighting” service by VARNA MUNICIPALITY.
Construction of a system for street lighting telemanagement, which will turn it into an “INTELLIGENT STREET LIGHTING OF VARNA” as an important part of the European policy for sustainable urban development and creation of Smart Cities, serves a large and progressively growing population.