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31-45 of 131 results
Recognition of Extended Dispatch Horizons in California’s Energy Markets
| By Energy Exemplar
Effective in 2009, the California ISO launched a new market structure that combines advanced unit commitment and dispatch processes with recognition of physical characteristics of the transmission system and generation resources. California’s upcoming implementation of aggressive targets for renewable energy will result in new, profound changes in markets and system operations. The CAISO is responding by making additional improvements in its unit commitment processes.
Power Generation > Hydro > White Papers
Power System Optimization by Increased Flexibility
| By Energy Exemplar
Great amounts of renewable energy are installed into power systems at state, regional and national level, often due to fulfill legislated mandates or renewable portfolio standards (RPS). While renewable energy is a means for reducing reliance on fossil fuels and decreasing greenhouse gas emissions, it is increasingly evident that there is need for flexible thermal fleet to help balance the renewables. The primary fuel considered for new builds is natural gas, and the default technology to meet capacity and flexibility needs is gas turbines in simple or combined cycle. In this work we show the substantial system benefits of increased flexibility and improved dynamic dispatch capability. This is achieved by exchanging traditional gas turbine based plants in the planning process to gas-fired combustion engine plants.
Power Generation > Hydro > White Papers
Forcasting the Long-Term Emissions Intensity Factor for Electricity Markets: An Australian Case Study
| By Energy Exemplar
Improvements in emissions intensity via technological innovation will enable the pathway to reductions in greenhouse gas emissions, which in turn will enhance our chances of avoiding significant changes in the environment. To avoid massive structural changes to our economy and societal dislocation due to a significantly more variable and an even hostile climate, a methodological framework for establishing the true emissions intensity of electricity production is required.
Power Generation > Hydro > White Papers
Modeling and Simulation of Advanced Pumped-Storage Hydropower Technologies and their Contributions to the Power System
| By Energy Exemplar
With the larger penetration of variable renewable energy resources, the role of energy storage in the power system is becoming increasingly important. The flexibility of operation of hydro and pumped-storage power plants and the variety of ancillary services that they provide to the grid enable better utilization of variable renewable resources and more efficient and reliable operation of the entire power system. The US Department of Energy’s Water Power Program has funded a recent study to enhance the modeling and simulation of advanced pumped-storage hydropower (PSH) technologies and examine the value of different services and contributions that they can provide to the power system.
Power Generation > Hydro > White Papers
Incorporating Flexibility in Utility Resource Planning
| By Energy Exemplar
The trend of increasingly variable net load is characteristic of all power systems with increasing penetration of wind and solar energy. As the amount of renewable energy increases, decreasing minimum net loads and increasing net load ramps require more frequent starts and stops, ramps and cycling, all of which impose costs and stress on the dispatchable generation fleet. Operational flexibility is needed to cope with varying net load.
Power Generation > Hydro > White Papers
Feasibility of Small Modular Nuclear Reactors for Ireland
| By Energy Exemplar
Electricity generation in Ireland contributes to almost a quarter of Ireland's overall greenhouse gas emissions and at the moment Ireland is the most import dependent country in Europe. In future markets Ireland's electricity generation will consist of a large supply coming from renewable sources. However, these sources are variable and still require a base load supply from a power plant to meet demand for the entire year.
Power Generation > Hydro > White Papers
Energy Storage Opportunities and Challenges
| By Energy Exemplar
Judging solely from the number of published reports, interest in energy storage has exploded in the last few years. The new interest appears to stem from the rapid development of variable renewable energy resources, and the perceived need for storage to accommodate the variable nature of these new resources. The need for balancing services, rapid generation ramping, and moving energy from times of excess to times of high demand are expected to increase with high levels of wind and solar energy penetration - exactly the types of services that energy storage can provide.
Power Generation > Hydro > White Papers
Examination of Potential Benefits of an Energy Imbalance Market in the Western Interconnection
| By Energy Exemplar
In the Western Interconnection, there is significant interest in improving approaches to wide-area coordinated operations of the bulk electric power system, in part because of the increasing penetration of variable generation.
Power Generation > Hydro > White Papers
Gas and Power Assets: Management and Portfolio Optimisation with PLEXOS
| By Energy Exemplar
PLEXOS® is a MILP-based next-generation energy markets/systems simulation and optimization software that uses mathematical programming, optimisation and stochastic techniques.
Power Generation > Hydro > White Papers
Generation, Transmission and Nat Gas Network Co-Optimizations
| By Energy Exemplar
PLEXOS is a proven power and natural gas market simulation tool that uses mathematical programming, optimisation and stochastic techniques (MIP, LP, SO).
Power Generation > Hydro > White Papers
Energy Forecasts for Ireland to 2020
| By Energy Exemplar
Forecasting in the current economic climate is a challenging process. Projections for economic growth, which are the key drivers behind our energy demand, are being re-defined more frequently than has been the case historically. Given the link between these energy forecasts and macro-economic trends such as future expected annual changes in GNP, population, new vehicle sales, new house builds and future energy price projections, using the most up to date data sources has been a focus of this exercise.
Power Generation > Hydro > White Papers
The Effectiveness of Energy Storage to Reduce Peak Demand on the Australian National Electricity Market
| By Energy Exemplar
The energy sector has forecasted significant increases in demand over the next decade with the general belief that this will be serviced by increased renewable energy deployment within the grid. Most of this will be within distribution rather than transmission networks and as a result we will see rapid developments within smart grid technologies.
Power Generation > Hydro > White Papers
Derivation of Robust Storage Targets for Large-Scale Pumped Hydro Energy Storage Using PLEXOS
| By Energy Exemplar
This paper examines the modelling of large-scale pumped hydro energy storage in future power systems where variable generation, primarily in the form of wind generation, is the dominant source of power generation. It is shown that current deterministic modelling techniques do not give a correct valuation to pumped hydro storage and can in cases overvalue the resource.
Power Generation > Hydro > White Papers
Energy Exemplar Explores Current Impacts on Kenya's Utility Distribution
| By Energy Exemplar
The electrical power sector in Africa is rapidly evolving as countries adopt novel and disruptive approaches/technologies to fulfil electrification goals and stimulate private investment in order to ensure supply adequacy and grow their economies. This all while remaining cognisant of the requirement for a sustainable sector via combinations of energy efficiency (EE), solar water heater (SWH) deployments, frameworks for net metering and Feed-in Tariffs (FITs) for embedded generation, utility scale renewables projects and Demand Side Participation (DSP). The consequence of these novel and disruptive approaches/technologies means that the unidirectional power-flow through distribution utilities and municipalities (from bulk suppliers to off-takers) is changing. As a result, reduced energy sales are expected, while still having to cover fixed costs including components of bulk purchase costs from existing suppliers, overheads as well as network investment and maintenance costs. This paper focusses on the impact of the abovementioned novel and disruptive approaches/technologies, via a case study on the main distribution utility in Kenya, Kenya Power and Lighting Company (KPLC).
Power Generation > Hydro > White Papers
Delivering a Competitive Australian Power System
| By Energy Exemplar
Australia’s abundant supply of coal has underpinned its power system. Competing countries have used a variety of energy resources, which sees many of them now equipped with resilient power systems to provide future electrical power. This paper considers the implication of possible scenarios for the Australian power system in 2035.
Power Generation > Hydro > White Papers
31-45 of 131 results