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61-75 of 189 results
Natural Gas and Power Systems/Markets Combined Modelling and Co-Optimisation in PLEXOS
| By Energy Exemplar
With the incorporation of the fully integrated Gas Modelling Classes in PLEXOS, complex layouts and mixed gas and electricity system topologies, of a large scale, can be modelled.
Power Generation > Wind > White Papers
Electrical Energy Storage to Make Wind and Solar PV Resources Disptatchable
| By Energy Exemplar
The transitioning to a lower carbon emissions path in most regions of the world has driven significant investments in alternative renewable sources of electrical energy with particular focus on solar photovoltaic (PV) and wind technologies. The typical argument against these technologies are issues related to their variability and unpredictability and management thereof. This paper attempts to show the value that electrical energy storage could add to a power system that includes a share of solar PV and wind. More specifically, the ability of energy storage to make these intermittent resources dispatchable.
Power Generation > Wind > White Papers
Renewable Generation Integration Study by PLEXOS
| By Energy Exemplar
This article first reviews the uncertainty and variability of the renewable generation; then briefly describes the approach to prepare the system for the renewable generation; third, the EIM is presented for the ramp capacity sharing between the Balancing Authority Areas (BAA) to improve the system readiness for the greater renewable generation penetration.
Power Generation > Wind > White Papers
Reliability Analysis using PLEXOS®
| By Energy Exemplar
The PLEXOS® simulator is a powerful tool for performing reliability studies on electric power systems. The simulator can calculate the standard metrics of LOLP, LOLE, EDNS and EENS from the PASA simulation phase using convolution. However, PLEXOS can also use the detailed chronological simulation of ST Schedule to produce the same metrics via Monte Carlo.
Power Generation > Wind > White Papers
Modelling and Quantifying the Benefit of Gas and Electric System Coordination
| By Energy Exemplar
The trend of the future electricity supply is going towards a direction with higher penetration of renewables. For the traditional fossil fuel fired generating resources, we will see the generation greatly shift from coal fired generating resources to gas fired, due to the apparently harsh environmental regulations put onto the coal plants. This trend makes the entire electricity supply more environmentally friendly, but it is also creating more pressure on the gas supply. While shale gas development solved the puzzle on the gas production side, gas fired generators still rely on the gas pipeline infrastructure and system awareness between gas and electric systems to ensure the gas supply whenever needed. That is especially true in an extreme event like Polar Vortex, when gas demands are extremely high in all sectors. Currently, the total gas consumption from the electric generators is around one third of the total gas consumption in the US, as shown in Fig. 1. With the electric power industry moving towards more gas fired generators, this percentage will keep going up, which means more interdependent gas and the electricity markets and therefore a strong need for studying both systems together. Words by Nan Zhang and Yuan Gao.
Power Generation > Wind > White Papers
Portfolio Optimisation by PLEXOS
| By Energy Exemplar
PLEXOS solves Portfolio Optimisation problem using the Security Constrained Unit Commitment (SCUC) and Economic Dispatch (ED) algorithm. This algorithm makes use of Mixed Integer Programming (MIP) to minimize a cost function subject to all operational constraints.
Power Generation > Wind > White Papers
Addressing the Challenges of US Electricity and Gas Sector using PLEXOS® Integrated Energy Model
| By Energy Exemplar
In the past, the US electricity markets were charactersied by vertically integrated and monopolistic electric utilities. These utility companies owned the generation, transmission and distribution networks and electric rates were reviewed and approved by public utility comissions or public boards. However, in the past couple of decades, these vertically integrated structures have been replaced by regional wholesale markets.
Power Generation > Wind > White Papers
Hydro Optimisation in PLEXOS
| By Energy Exemplar
Power systems having both hydro-electric and thermal generation require a systematic and coordinated approach in order to determine an optimal policy for dam operations. The goal of a hydro-thermal planning tool is to minimise the expected thermal costs along the simulation period. These types of problems generally require stochastic analysis to deal with inflow uncertainty. This can increase the mathematical size of the problem and can easily become cumbersome to solve.
Power Generation > Wind > White Papers
Assessing Electrical Transmission Constraints for the Southern African Power Pool (SAPP) in PLEXOS
| By Energy Exemplar
The Southern African Power Pool (SAPP) was formed in 1995 to promote trading of electricity between nations in the Southern African Development Community (SADC). Initially, the national utilities of each SADC country were included as SAPP members to co-operatively trade electricity (via bilateral contracts and a Short Term Energy market (STEM)). The STEM was replaced in 2009 with a competitive trading market (the Day Ahead Market (DAM)) and inclusion of Independent Power Producers (IPPs) and Independent Transmission Companies (ITCs) was late allowed.
Power Generation > Wind > White Papers
Hydro Cascade & Storage Optimisation Utilising PLEXOS
| By Energy Exemplar
Energy Exemplar support staff analyse the current renewable situation in Europe. Facing challenges in modelling hydro assets compared to conventional generation, PLEXOS Hydro Modelling can explore different approaches for short versus Long term forecasting.
Power Generation > Wind > White Papers
Flexible power generation and interconnection capacity needs of the Italian power system using PLEXOS® LT plan
| By Energy Exemplar
One of the main developments of the last few years on the Italian power market has been the significant increase of renewable capacity in the form of wind and solar power plants. Using a PLEXOS® dataset based on data available from Terna and various utilities, we have modelled the Italian power market through the six geographical zones and considered the medium term expected scenarios.
Power Generation > Wind > White Papers
Analysing the Demand – Supply Dynamics of the Australian South Eastern Gas Market Using PLEXOS®
| By Energy Exemplar
These are interesting times for the Eastern Australian gas market with the impending LNG play coming online. The previously stable and long-term contract market for domestic gas supply on the east coast will be subject to market forces that are in part determined on the global stage. Exactly how the market will respond to these changes is not yet clear, however, one important question on the mind of every market participant is: “do we have enough gas to meet medium to long term domestic demand?”
Power Generation > Wind > White Papers
Different Types of Electricity Markets Modelled Using PLEXOS® Integrated Energy Model – The UK Balancing Market Example
| By Energy Exemplar
Electricity is a commodity that cannot be stored economically in large quantities. Therefore, generation must equal demand plus energy lost as heat when electricity is transported (transmission / grid losses) on an instantaneous basis. Otherwise the grid frequency starts deviating from its reference value, which can result in a system collapse. The design of electricity markets is adapted to deal with this particular property of electricity. Different types of electricity markets are arranged in a sequential order, starting years before the actual delivery and ending after the actual delivery.
Power Generation > Wind > White Papers
Managing Risks and Optimising an Energy Portfolio with PLEXOS®
| By Energy Exemplar
Energy markets inherently exhibit far greater risk compared to traditional financial markets such as equities and bonds. Energy commodities in general display differentiating characteristics when compared to other asset classes which make conventional approaches to valuation, hedging and risk management a challenge for even the talented of risk managers. Market fundamentals play a larger impact with both supply and demand factors causing price behaviour to be very uncertain and at times volatile when compared to the price behaviour of other asset classes. Weather, infrastructure failure and fuel shortages coupled with rapidly changing demand for electricity on a daily or even hourly time scales make accurate price forecasting a constant concern. This white paper aims at analysing some of the quantifiable risks facing integrated energy companies and how fundamental optimisation software coupled with systematic and robust analysis can help decision makers manage risk and optimise their energy portfolio to retain their competitive advantage.
Power Generation > Wind > White Papers
Analysing the Effect of LNG Exports on the Australian East-Coast Gas Market Capacity Using PLEXOS®
| By Energy Exemplar
These are interesting times for the eastern Australian gas market with the commencement of LNG exports from Queensland. The previously stable and long-term contract market for domestic gas supply on the east coast will be subject to market forces that are in part determined on the global stage.
Power Generation > Wind > White Papers
61-75 of 189 results