Transmission system related Studies
1. Transmission expansion studies:
• running market analyses with market simulation software for different time horizons to find the best solution from a predetermined set of potential solutions,
• Identification of internal bottlenecks in national grid.
• Sensitivity analyses of grid performance on different scenarios
• checking specific regimes with Load Flow Software, and
• checking the solutions from an economic point of view with a cost-benefit analysis.
• Performance of candidate national projects in different scenarios.
2. Strategy for reconstruction/ revitalization of National Transmission System TSOs worldwide are facing significant challenges in carrying out their tasks related to the development of the network and facing the gradual increase in the need to renew aging equipment to maintain a high level of security of supply. The renewal of the network equipment will be required in the next decades. Significant investments must be made to maintain system performance and cost under control. According to some analyses overhead lines reconductoring and replacement will occupy around 77% of expenses of TSO’s in next 15 years. TSOs have no common approach and methodology today to assess how and when to renew the existing system components. These types of Studies will support decision to renew existing assets of the network and create dataset for input to the Maintenance and Refurbishment as Asset Management Plan of TSOs in coming years.
3. Dynamic modeling of National Power system – creating and verify National Dynamic Simulation Model. All the machines connected to the high voltage network and represented in Load flow model are represented individually with appropriate data set, which consists of models of generators, excitation systems, power system stabilizers (if any) and turbines and governors.
• Based on received data, Model Integrator constructed initial dynamic model. For all new generator units and units for whom data is not available for some reason, typical parameters, or production unit’s construction data (if available) are used.
• Each generation unit which is in operation in at least one regime was tested in isolated operation on standard excitation system test and turbine-governor controller test. In case when response to these tests didn’t comply with standard requirements, appropriate parameters have been adjusted.
• Special attention is paid on modeling static and dynamic parameters of RES and BESS plant equipment, such as modules, inverters, transformers, cables, BESS
• Check system response to zero disturbance, i.e., simulation without any disturbance in system, for period of monitoring 10 seconds. System response shows “flat line” which means that all values are within limits and model showed numerical stability.
• Check transient stability to selected disturbances in system. The model was tested on typical disturbance (fault on some important branch in system followed by outage of
Power System and Electricity Market Studies and Analyses 3
faulted branch). As result from such simulation, system reached new state equilibrium without any tripping of generator or any other element in system.
4. Defense Plan of National Power System
• Dynamic model of National Power System
• Operational Planning’s and real-time operation
o Observability area (OTDF analysis)
o N-1 security analysis in critical system states (cascade tripping, rare and extreme contingencies etc.)
o Awareness of power system states
o Recommended remedial actions (preventive and curative)
o Implementation in system emergency plans
• Power System restoration without external Voltage soured (Bottom-up)
• Power System restoration with external Voltage soured (top-down)
• System restoration requirements
• Operation procedure for restoration
5. Study for Power Losses in National Power System
Battery Energy Storage Services
Electricity grids across the world are evolving to accommodate the rapid rise of renewable and decentralised energy generation technologies. Maintaining moment-to-moment power stability across these networks is a growing challenge for transmission and distribution network operators.
Harnessing intermittent sources of electricity at a local level and transforming their value into dispatchable network resources is now a technically realistic prospect in the advent of maturing Battery Energy Storage Services technologies. Greater energy security and the availability of requisite capacity during daily peak demand periods can be achieved through the flexibility that Battery Energy Storage Services technologies are well suited to enable, absorbing power and energy when nature is ready and releasing it when consumers are ready.
COLENCO can assist electricity generators, network utilities and energy suppliers enhance the flexibility and energy security of their systems and increase the value of their electricity operations by helping them utilise the maturing range of Battery Energy Storage Services technologies now available.
• Investment analyses in BESS: running calculations to investigate if the investment in batteries to flatten the production profile of PV is economically justified.
• Grid balancing and support systems including Virtual Power Plants
• PV and wind generator co-located systems for firming capacity and resolving settlement imbalance
• Continuity of power from renewable generators in weak grid, micro-grid and stand-alone situations
Power System and Electricity Market Studies and Analyses 4
• Transient (dynamic) analyses will provide a detailed understanding on the effects of significant disturbances that may occur during operation of the planned PV plant incl. BESS. The influence of such disturbances shall be simulated in respect to the PV power plant and the related grid integration point (PoC).
Smart grid related Studies
1. Automated Demand Response - The strategic objective of the study is to define basic framework and guidelines for potential development of future programs for integration of demand response in National Transmission System in terms of achieving a greater security of supply in the system, as well as greater economic efficiency and increased sustainability. Processes, aimed to make demand flexible, require considering the multifaceted features of the problem.
2. Effects of Plug-in Electric Vehicles (PEV) on the National Transmission and Distribution Grid- This type of studies investigates effects of plug-in electric vehicles on the transmission electricity grid. More specifically, it will suggest approaches for:
• Offering backup for renewable power sources including wind and solar power,
• Improving grid efficiency, stability, reliability of the transmission grid, and,
• Reducing utility operating costs and even potentially generation of revenue
Power System and Electricity Market Studies and Analyses 5
Software Tools
Our staff has experience in using most advanced methodologies and worldwide leading software tools.
NEPLAN Electricity is a software tool to analyse, plan, optimize and simulate electrical networks. The strength of the software is the extremely user-friendly graphical interface with the extensive libraries for the network elements, protection devices and control circuits, which allows the user to perform study cases very efficiently. The software has a modular concept, is based on international standards, such as IEC, ANSI, IEEE, etc. and is customizable for the European and US market. It is used in transmission, distribution, generation / industrial networks amongst others for network and investment planning, power quality, multi-period optimization, protection setting and assessment, dynamic simulation (RMS/EMT). The stationary and dynamic models for 1-2-3 phase (with neutral and earth wire) AC and DC networks have a high accuracy and performance.
PSS®E – high-performance transmission planning and analysis software. PSS®E is used by planning and operations engineers, consultants, universities, and research labs around the world. PSS®E allows you to perform a wide variety of analysis functions, including power flow, dynamics, short circuit, contingency analysis, optimal power flow, voltage stability, transient stability simulation, harmonics, time series power flow and much more.
Antares-Simulator is an Open Source (GNU GPL 3.0) standalone software. It is a sequential Monte-Carlo simulator designed for short to long term studies of large, interconnected power grids. It simulates the economic behaviour of the whole transmission-generation system, throughout the year and with a resolution of one hour.
PSS®SINCAL Platform has enabled engineers to tackle different challenges of the changing distribution, transmission, and industrial power systems, including maintaining high reliability of supply and efficiently integrating Distributed Energy Resources. With the modular platform of PSS®SINCAL, power system planning and operation engineers are supported with their entire workflow from the initial data import and network modelling to basic and extended calculations, all the way to extensive protection simulations and analysis as well as other methods in time and frequency domains.
Electrical Transient Analyzer Program (ETAP) is an electrical network modeling and simulation software tool used by power systems engineers to create an "electrical digital twin" and analyze electrical power system dynamics, transients, and protection.
COLENCO provide the software solution in the field of electric power systems, related to the financial modeling and financial analyses. Our software follows specific needs of energy stakeholders for professional and fast tool. Develop detailed payback and IRR scenarios for each project design using detailed long-term cash flow forecasts
Customize cash-flow forecasts based on type of project, financing options and available incentives Compare multiple cash-flows for the same project design, on the same proposal document, to help our client make decisions faster
Power System and Electricity Market Studies and Analyses 6
OUR REFERENCES
Short Description
Date
2023-2023
COLENCO has been assigned to prepare a Compliance Study for Wind Power Plant (WPP) Perun, aiming to analyze the capabilities of the Wind Turbine Generators (WTGs) in WPP Perun against the requirements from the Transmission and Distribution Grid Codes applicable in Macedonia for the connection of Wind Farms (WF) at 110 kV being in ownership of the Distribution Grid Operator.
Software used: PSS/E and PSS Sincal
Name
Study for Compliance of WPP Perun with the Macedonian Transmission and Distribution Grid Code (30 MW) connect on 110 kV level
Assignments and Financed Interenergo part of KELAG group
Short Description
Preparation of a long-term plan for the development of the distribution system with a description of the current state of the distribution system, methodology and criteria according to which the investment plan is prepared, locations where the investments will be realized and description of the investments.
Scope of work: Legislation, bylaws and other documents based on distribution system planning
Description and characteristics of the existing network Consumption forecast
Distribution system loss analysis
Methodology and criteria for evaluation of investment projects
Distribution network planning tools
Development plan
Integration of renewable energy sources in the distribution system
Investments in the field of metering and meters
IT projects
Investments for infrastructure projects
Financial resources and financial resources for the realization of the plan
Date
2022-2022
Name
10 Years Network
Development Plan for Distribution System Operator
Power System and Electricity Market Studies and Analyses 7
Financed EVN Macedonia
Assignments and
Country Macedonia
Country Macedonia
Short Description
The purpose of this Studies is to meet the Client’s requirements regarding its intention to invest in Cogeneration Power Plant in Skopje –Macedonia with electrical power capacity of 150 MW end heat energy generation capacity of 105 MW.
We perform:
-High Voltage electrical connection of new CCHP Metka for evacuation of generation
- Medium Voltage electrical Connection during construction and back-up supply
- Preparation of network models,
- Calculation of evacuation capacity;
- Short-circuit;
- Roadmap for connection;
- Optimal Investment analyses
- Load flow calculation
- Short circuit analyses
- Contingency analyses
Software used ETAP
Date 2023-2023
Name Consultancy services for support and assistance in determination of development and connection conditions of the Cogeneration Heat and Power Plant in Skopje
Assignments and Financed MYTILINEOS
Date 2020-2022
Short Description
Preparation of network integration studies for PV plant (150 MW) and BESS (50 MW) around Soma.
Network modeling of West African Power pool, Create Dynamic model of BESS and PV plant. Load Flow and Voltage Sensitivity Analyses including Contingencies, Short Circuit Analyses
Transient Stability
Frequency stability Analyses
Voltage stability Analyses
Software used PSS/E and PSS/Sincal
Name Feasibility Study for regional Solar Park Plug and Play in The Gambia
Assignments
West Africa
Power Pool
Financed
World Bank
Power System and Electricity Market Studies and Analyses 8
Country Macedonia
Country Gambia
Country Bosnia and Herzegovina
Short Description
The overall objective was to prepare feasibility study with the preliminary design for the Solar Plant, which will, among all other as required for this kind of documentation, provide the following:
Consultant’s opinion on the proposed location
Overview of actual PV module technologies, inverters, tracking and energy storage technologies.
Site assessment with solar resource and energy yield calculation/estimation for proposed site locations with the determination of the optimal plant configuration.
Analysis/determination of the technical, environmental, financial and commercial feasibility of the Solar Plant construction.
Calculation of Grid evacuation capacityt
Date 2019-2019
Country Nigeria
Short Description
Main goal of Study for connection is to evaluate performance of the local transmission network in vicinity of connection point of the plants Abuja and Kaduna. All analyses are prepared in line with relevant requirements and conditions stipulated in the national Gride Code, relevant national documentation, international practice, and experience.
Type of analyses:
- Load flow calculation
- Dynamic simulation
- Short circuit analyses
- Contingency analyses
Software used PSS/E
Name
Feasibility Study with preliminary Design for development of 60 MW grid connected utility scale PV power plant
Assignments and Financed Confidential
Date 2019-2019
Name Study for connection of combined cycle gas power plants in Abuja and Kaduna, Steady state, and Dynamic Analyses
Assignments and Financed
Nigerian National Petroleum Corporation
Power System and Electricity Market Studies and Analyses 9
Country Bulgaria
Short Description
BALKAN GAS HUB FEASIBILITY STUDY
The main purpose of the Balkan Gas Hub is diversification of natural gas supply of the South-East Europe countries from different sources all over the World, on transparent and non-discriminatory principles that follows the third European energy package. The hub will serve as a facility for providing, Azerbaijani natural gas, Russian gas and / or liquefied natural gas to the region as well as to the different European hubs, e.g. central European gas hub in Austria. The realization of the Balkan gas hub concept completely follows the plans for development of gas infrastructure in Europe. It will improve energy security, enable diversification of natural gas sources and routes for supply. The project is completely in line with the goals identified by the HighLevel Group on Gas Connectivity in Central and SouthEast Europe (CESEC), as well as with the development of the European Energy Union.
The feasibility study include the following:
- Analyzes of target markets and assessment of gas demand and gas supply scenarios;
- Study of the main technical aspects of the Balkan Gas Hub, part of the project of “common interest”;
- Study of appropriate business models, evaluation of different models of public-private partnership and ownership structure;
Date 2018-2019
Mozambique
Short Description
Phase I – Study of the possible alternatives; Propose alternatives, screen the alternatives, recommend and select the preferred option, and preliminary design of the preferred option.
Full Feasibility Study of the preferred scheme.
Type of analyses:
Load flow calculation
Dynamic simulation
Short circuit analyses
Contingency analyses
Software used PSS/E
Name
Balkan gas hub Feasibility Study
Financed Bulgartransgaz
Date 2018-2018
Name Feasibility Studies for MozambiqueZambia 400 kV interconnection project
Assignments
AF Consult
Financed
Southern African Power Pool
Power System and Electricity Market Studies and Analyses 10
Short Description
Main objective of this Project is preparation of a Transmission Network Development and Investment Plan for the electricity transmission sector in Albania, that will ensure assessment and review of the condition of the current transmission system as well as identification of actual and future bottlenecks in the Albanian transmission system, elaborating thus the load and generation forecasts for 5, 10 and 15 year horizons
The scope of works included the participation in the following tasks:
- Network Study Methodology Network Scenarios
Technical - Assessment and Scenarios
- Power system models and main topological scenarios
- Power system steady state scenarios System analysis results
- Load flow and (n-1) security analyses.
- Short-circuit calculations
- Transmission losses.
- TTC/NTC calculation.
- Voltage profile analysis.
- Transient stability analysis
Software used PSS/E
Date 2018-2018
Short Description
Feasibility Study for OHL Banja Luka-Lika (155km) and OHL Brinje - Konjsko (115km)
1. Network Study Methodology Network Scenarios Technical Assessment and Scenarios
2. Power system models and main topological scenarios Power system steady state scenarios System analysis results. Evaluation matrix for system analysis
3. Load flow and (n-1) security analyses; Short-circuit calculations; Transmission losses; TTC/NTC calculation; Voltage profile analysis; Reliability assessment
4. Transient stability analysis
Software used PSS/E, PSS/MUST
Name Investment and Network Development Plan for the Electricity Transmission System in Albania
Assignments
Albanian transmision system operator
Financed
KfW
Date 2018-2018
Name Feasibility Study, including ESIA for strengthening of main Croatian transmission North-South axis enabling new interconnection development
Assignments
Power System and Electricity Market Studies and Analyses 11
HOPS Financed EBRD
Country Croatia
Country Albania
Country Nigeria
Country Ukraine
Date 2017-2017
Short Description
Analyses of possibility for large scale development of Electro mobility, standardization, new services, EV charging infrastructure and resolving technical issues
Assignments Ukrainenergo
Name Demand Response Vehicles to Grid, Second Power Transmission Project (PTP-2) – Procurement and Project Management, Ukraine
Date 2017-2017
Short Description
Grid Evacuation Study:
1. Power system models and main topological
2. Load flow and (n-1) security analyses; Short-circuit calculations, Transmission losses; TTC/NTC calculation; Voltage profile analysis.
3.Transient stability analysis
Software used PSS/E, PSS/MUST
Assignments
AF Consult
Country Ukraine
Short Description
Technical and financial overview of for forecasting services
Assignments Ukrainenergo Financed EBRD
Name RES forecasting services procurement
Name Feasibility Study for a new gas fueled power plant near Benin City
Power System and Electricity Market Studies and Analyses 12
Country Uganda
Short Description
Review the existing grid manuals provided by UETCL
Review of National Grid Code and UETCL Corporate Business plan
Study of international standards and requirements for company standards
Appreciation of sector requirements/ expectations through interaction with key internal and external stakeholders
Assessment of existing engineering procedures and practices in UETCL
Update of the Grid Manuals in line with identified gaps
Development of Consolidated Grid Manual
Development of performance report
Date 2017-2017
Name Grid code for electricity transmission design and planning manual for Uganda
Assignments and Financed
Uganda Electricity Transmission Company Ltd
Date 2017-2017
Country Macedonia
Short Description
The Hydro system Lipkovo is located in the northeastern part of Macedonia and consists of two reservoirs created by the construction of dams Lipkovo and Glaznja and two small hydro power plants (SHPP) Glaznja and Lipkovo. A key objective of the project is to determine the necessary actions for the reconstruction of SHPPs and SHPP Glaznja Lipkovo and putting it back into operation in the grid.
- Dam analysis
- Water resources analysis
- Financial and commercial part
- Preparation of ESIA Study
Name Feasibility Study for reconstruction of SHPP Lipkovo (0.69MW) and SHPP Glaznja (2.07MW)
Assignments and Financed
Macedonian Power Plants
Power System and Electricity Market Studies and Analyses 13
Country Macedonia
Short Description
A key goal is to increase Macedonia's own electricity production through the use of water resources, while through the construction of hydro-power plants on the river Vardar, Macedonia seeks to regulate the water potential regime and use, spatial planning, protection of goods, the social aspects and exploitation of water resources.
- Dam analysis
- Water resources analysis
- Tecno-economical assessment
- Optimal Grid connection
-Grid Evacuation Capacity
Date 2016-2018
Name
Pre-Feasibility Study for Vardar valley 12HPPs (320MW)
Assignments and Financed
Macedonian Power Plants
Country
Macedonia
Short Description
Performing Power Systems Analyses in order to verify Compliance of large consumer with Grid Code
- prepare dynamic model for Large consumer
- update regional dynamic model of Southeast Europe
- Transient Stability Analyses
- Voltage Stability Analyses
- Power Quality: Harmonic and Flicker Analyses
-NEPLAN training
Software used PSS/E, PSS/MUST, NEPLAN
Date 2015-2015
Name
Grid Compliance Study for Large Consumers - smelt melting factory and copper mine
Assignments and Financed
Macedonian Transmission System Operator
Power System and Electricity Market Studies and Analyses 14
Short Description
The thermal power plant Oslomej (TPP Oslomej) is one of the two main thermal power generation sites of JSC Macedonian Power Plants (ELEM). It uses as fuel lignite from the local mine Oslomej-Zapad as main fuel. The locally available coal reserves will last only for a short period of time. On the other hand, TPP Oslomej provides approximately 10% of the Macedonian electricity production and its continued operation is essential for the country’s power supply. The main purpose of Study was modernization of TPP Oslomej in order to make it fit for the use of imported hard coal and to make it simultaneously complying with current as well as upcoming environmental regulations. Grid Evacuation Study.
1. Power system models and main topological scenarios
2. Load flow and (n-1) security analyses; Short-circuit calculations TTC/NTC calculation; Voltage profile analysis;
3. Transient and Voltage stability analysis
Software used PSS/E and PSS/MUST
Date 2014-2015
Name Feasibility Study and implementation of project Modernization of TPP Oslomej Including Coal transport Environmental Impact Assessment Grid Evacuation Study
Short Description
The Government of Kenya, Uganda and Rwanda mobilized financing for the construction of the Uganda-Kenya and Uganda – Rwanda, 400 kV interconnection. Project goal is to eliminate transmission bottlenecks as well as enhancing cross border regional power trade
1. Network Study Methodology Network Scenarios Technical Assessment and Scenarios
2. Power system models and main topological scenarios Power system steady state scenarios System analysis results
3. Load flow and (n-1) security analyses; Short-circuit calculations; Transmission losses; TTC/NTC calculation; Voltage profile analysis; Reliability assessment Transient stability analysis
4. Training Software used PSS/E, PSS/MUST
Assignments and Financed Macedonian Power Plants
Date 2013-2015
Name Feasibility Studies
For 400 kV Interconnection
StandardizationKenya, Uganda, and Rwanda Financed Nile Equatorial Lakes Subsidiary Action Plan (NELSAP) – Nile Basin Initiative
Power System and Electricity Market Studies and Analyses 15
Kenya Uganda Rwanda
Country Macedonia
Date 2013-2014
Short Description
Studies for expansion of the Kenyan High Voltage Grid by constructing the following additional transmission lines and related substations:
New 220 kV transmission line from Kisumu through Kakamega to Musaga (72 km) and related substations
New 132 kV transmission line from Webuye through Kimilili to Kitale (73 km) and related substations
New 132 kV transmission line from Kakamega to Kaimosi (25 km) and related substations
New 132 kV transmission line from Sotik to Kilgoris (48 km) and related substations
1. Power system models
2. Load forecasting
3. Defining scenarios
4. Load flow and (n-1) security analyses; Short-circuit calculations TTC/NTC calculation; Voltage profile analysis;
5. Dynamic modelling and Transient stability analysis
Software used PSS/E and PSS/MUST
Assignments KETRACO
Name
FEASIBILITY STUDIES AND PROJECT ENGINEERING FOR TRANSMISSION LINES AND SUBSTATIONS, ASSIGNMENT II
Country Myanmar
Date 2013-2013
Analyses of different tariff systems and proposed most
Name
Transmission Cost Allocation
Consultancy Services for Power System of Myanmar Power Grid
Financed
The Government of the Republic of the union of Myanmar Electric Power Enterprise
Power System and Electricity Market Studies and Analyses 16
Country Kenya
Relevant experience in Europe
Power System and Electricity Market Studies and Analyses 17 Russia Estonia Latvia Lithuania Russia Denmark Norway Sweden Finland Iceland Austria Slovenia Croatia Macedonia Albania Turkey Romania Bulgaria Moldova Ukraine Hungary Slovakia Czech Rep. Poland Belarus Bosnia and Herzegovina Serbia Andorra Italy France Switzerland Germany Netherlands Luxembourg Belgium Spain Portugal Great Britain Ireland Greece Cyprus Malta Montenegro 6 1 [300 to 400[ [200 to 300[ 400+ 400+ 400+ 400+ 400+ 400+
