scholarly journals Harnessing the Value of Demand-Side Flexibility in Electricity Markets

2020 ◽  
Author(s):  
◽  
Zane Broka
Keyword(s):  
Power System ◽  
Demand Response ◽  
Electricity Markets ◽  
Economic Assessment ◽  
Economic Benefits ◽  
Point Of View ◽  
Demand Side ◽  
Doctoral Thesis ◽  
Balancing Energy ◽  
The Baltic

As the 2025 deadline for synchronisation with the Continental Europe grid approaches, the Baltic transmission system operators have recognised the need to involve more local balancing resources. Additionally, demand for balancing energy is expected to rise due to the growing share of intermittent generation sources. It requires for increased flexibility of the Latvian power system. This Doctoral Thesis is focussed on improvements of power system flexibility through employment of demand-side resources and optimisation of the overall balancing process. An optimised activation strategy of reserves is proposed which can be part of the Baltic TSOs’ workflow where traditionally only human-based dispatching has been employed. Furthermore, assessment of the operating, planning and economic benefits obtainable from demand response (DR) in the Latvian power system is provided. Finally, a robust tool for an economic assessment of DR from the end-user point-of-view has been developed. Hence, the Doctoral Thesis provides an array of tools and methods on establishing the value of demand response in the Latvian power system.

scholarly journals Optimum Capacity and Placement of Storage Batteries Considering Photovoltaics

2019 ◽  
Vol 11 (9) ◽  
pp. 2556 ◽  
Author(s):  
Hiroki Aoyagi ◽  
Ryota Isomura ◽  
Paras Mandal ◽  
Narayanan Krishna ◽  
Tomonobu Senjyu ◽  
...  
Keyword(s):  
Power System ◽  
Demand Response ◽  
Supply And Demand ◽  
Point Of View ◽  
Storage Battery ◽  
Optimal Arrangement ◽  
Economic Point ◽  
Optimal Capacity ◽  
One Year ◽  
Storage Batteries

In recent years, due to the enforcement of the Feed-in tariff (FIT) scheme for renewable energy, a large number of photovoltaic (PV) has been introduced, which causes fluctuations in the supply-demand balance of a power system. As measures against this, the introduction of large capacity storage batteries and demand response has been carried out, and the balance between supply and demand has been adjusted. However, since the increase in capacity of the storage battery is expensive, it is necessary to optimize the capacity of the storage battery from an economic point of view. Therefore, in the power system to which a large amount of photovoltaic power generation has been introduced, the optimal capacity and optimal arrangement of storage batteries are examined. In this paper, the determination of storage battery placement and capacity considering one year is performed by three-step simulation based on probability density function. Simulations show the effectiveness of storage batteries by considering the introduction of demand response and comparing with multiple cases.

Research on Demand Side Response System of Electricity Price Under Electricity Market Incentive Mechanism

2021 ◽  
Author(s):  
Fu Xianyu ◽  
Zhou Hongmei ◽  
Qi-jie Jiang ◽  
Ke Fan
Keyword(s):  
Power System ◽  
Demand Response ◽  
Electricity Market ◽  
Incentive Mechanism ◽  
Operating Cost ◽  
Electricity Price ◽  
Demand Side ◽  
Peak Shaving ◽  
Optimal Dispatch ◽  
Grid Operation

Aiming at the traditional day-ahead dispatching scheme of power generation, the paper proposes a power system security optimization dispatching model that considers the demand response of electricity prices under the electricity market incentive mechanism. Based on the peak and valley time-of-use electricity price, the paper establishes an incentive compensation mechanism to encourage users to be active. Participating in demand-side resource scheduling makes the effect of “peak shaving and valley filling” more pronounced. Simultaneously, to rationally configure the reserve capacity of grid operation, the system incorporates the expected power outage loss into the proposed model to ensure the grid operation safety. The analysis of calculation examples based on IEEE24 nodes shows that the power optimal dispatch model proposed in the paper considering demand response and expected outage loss can reduce the operating cost of the power grid under the premise of ensuring a certain level of reliability and realize the economy of the power system in the market environment and safe operation.

scholarly journals Fast frequency oscillations detection in low inertia power systems with excessive demand-side response for frequency regulation

2021 ◽  
Vol 19 ◽  
pp. 557-560
Author(s):  
Leo Casasola-Aignesberger ◽  
◽  
Sergio Martinez
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Demand Response ◽  
Electric Power System ◽  
Frequency Regulation ◽  
Demand Side ◽  
System Operation ◽  
Demand Side Response ◽  
System Inertia

The reduction in inertia present in electric power systems due to the increase in renewable generation interfaced with power converters presents various challenges in power system operation. One of these challenges is keeping the frequency of the system within acceptable bounds, as the reduced inertia allows faster changes in frequency. A possible way to mitigate this effect is to introduce a certain degree of frequency response in the demand side, in such a way that a loss in generation leads to a decrease in the demanded power, levelling the generation-demand balance. In this paper, one limitation of this approach is analysed, specifically the case where the demand response is excessive to the system inertia and demand, producing fast frequency oscillations. A scenario where this happens, on a simulated islanded system based on the electric power system of the island of San Cristóbal, in Galápagos (Ecuador), is studied, and a method of detecting these oscillations is proposed, as a first step to develop an appropriate response to them.

Co-optimization of Energy and Demand-Side Reserves in Day-Ahead Electricity Markets

2015 ◽  
Vol 16 (2) ◽  
pp. 195-206 ◽  
Author(s):  
S. Surender Reddy ◽  
A. R. Abhyankar ◽  
P. R. Bijwe
Keyword(s):  
Demand Response ◽  
Electricity Markets ◽  
Optimization Problem ◽  
Demand Side ◽  
Load Modeling ◽  
Multi Objective ◽  
Welfare Maximization ◽  
Social Welfare Maximization ◽  
Strength Pareto Evolutionary Algorithm ◽  
Voltage Dependent

Abstract This paper presents a new multi-objective day-ahead market clearing (DAMC) mechanism with demand-side reserves/demand response (DR) offers, considering realistic voltage-dependent load modeling. The paper proposes objectives such as social welfare maximization (SWM) including demand-side reserves, and load served error (LSE) minimization. In this paper, energy and demand-side reserves are cleared simultaneously through co-optimization process. The paper clearly brings out the unsuitability of conventional SWM for DAMC in the presence of voltage-dependent loads, due to reduction of load served (LS). Under such circumstances multi-objective DAMC with DR offers is essential. Multi-objective Strength Pareto Evolutionary Algorithm 2+ (SPEA 2+) has been used to solve the optimization problem. The effectiveness of the proposed scheme is confirmed with results obtained from IEEE 30 bus system.

scholarly journals Voltage Security-Constrained Optimal Generation Rescheduling for Available Transfer Capacity Enhancement in Deregulated Electricity Markets

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4371 ◽  
Author(s):  
Oludamilare Bode Adewuyi ◽  
Mikaeel Ahmadi ◽  
Isaiah Opeyemi Olaniyi ◽  
Tomonobu Senjyu ◽  
Temitayo Olowu ◽  
...  
Keyword(s):  
Power System ◽  
Electricity Markets ◽  
Optimal Power Flow ◽  
Voltage Stability ◽  
System Security ◽  
Economic Benefits ◽  
Power System Security ◽  
Voltage Security ◽  
The World ◽  
Available Transfer Capacity

Modern utilities are forced to operate very close to their loadable limits (maximum capacity) due to geographical, economical and some technical reasons. The deregulation of the power industry, the competitive nature of modern electricity markets and the continuous quest for modernization of cities and hamlets all over the world has also led to fast increase in the load demand. The stability of power systems all over the world are threatened with recurrent occurrences of voltage stability issues. Hence, Inter-zonal energy transactions between willing supplier and buyers need to be done with adequate consideration for power system security. In this work, a voltage security-constrained optimal generator active and reactive power rescheduling is carried out using the IEEE 30 and IEEE 57 bus systems. The simultaneous maximization of available transfer capacity (ATC) and voltage stability margin (VSM), using the weighted sum approach, is the objective function. Credible optimal power flow and power system security constraints are considered. Three variants of particle swarm optimization in MATLAB® are used in this work for analyzing the results for objectivity. The technical and economic benefits of the optimal generator rescheduling on the system’s ATC, VSM, line losses, line flow and voltage profile are adequately analyzed.

Security and Economy Analysis of Power Grid Considering the Uncertainty of Demand Side and Generation Side

2013 ◽  
Vol 860-863 ◽  
pp. 398-404
Author(s):  
Shu Xiang Wang ◽  
Ji Chun Liu ◽  
Wei Dong Zheng ◽  
Chuang Deng ◽  
Hou Dong Xu ◽  
...  
Keyword(s):  
Power System ◽  
Emergency Management ◽  
Wind Power ◽  
Economic Benefits ◽  
Demand Side ◽  
Generator System ◽  
Wind Generators ◽  
Electric Vehicle Charging ◽  
Reduction Techniques ◽  
Simulation Results

In the emergency management of power system, there are many uncertain factors, such as wind power of the generation side and electric vehicle charging of the demand side. Firstly, the probability statistics model of PEVs charging demands was established, which considered the random factors of the probability distribution of PEVs charging. Then, we used scenarios generation and reduction techniques to predict the output of wind generators. The uncertainty of wind power was described by scenarios set. On this basis, the dispatch model considering PEVs charging and wind power was proposed. Finally, simulation results on the 5-generator system indicated the effectiveness of the proposed method. The synergistic dispatch model considering wind power and PEVs charging can effectively improve the utilization of wind power and the safety and economic benefits of the power system.

scholarly journals Analysis of Demand Side Response potential in energy clusters

2019 ◽  
Vol 108 ◽  
pp. 01027
Author(s):  
Andrzej Manujlo ◽  
Mariusz Kaleta
Keyword(s):  
Local Community ◽  
Electrical Energy ◽  
Energy System ◽  
Point Of View ◽  
Demand Side ◽  
Distributed Resources ◽  
Strong Trend ◽  
Balancing Energy ◽  
Short Horizon ◽  
Demand Side Response

The paper analyses the possibilities of Demand Side Response (DSR) applications from the point of view of an electricity power cluster. Three possible scenarios for DSR mechanisms that facilitate balancing the cluster in short horizon were formulated. Two scenarios include shifting a part of demand that creates unplanned balancing energy in the cluster. In the first scenario, the unplanned balancing energy is moved to hours with lowerprices on the Balancing Market (BM), while in second scenarios we assume that this energy is bought on the competitive market. The third scenario concerns mitigation of investment cost for local distributed resources (DERs) due to DSR program. We present an analysis of monetary savings that has been carried out for exemplary clusters in Polish electrical energy system and based on Polish Balancing Market and Power Exchange data. Although the potential savings per household are too small to create strong incentives for DSR, this amount of money could be notable for the local community as a whole. There is also a big opportunity for increasing the benefits resulting from DSR in case of perceived stronger differentiation of unbalanced prices on BM as well as strong trend for price increase. We believe that presented results may play an important role to draw the potential development directions for national power clusters.

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