Power Grid Economics in a Peak Load Pricing Framework

1977 ◽  
Vol 10 (4) ◽  
pp. 621 ◽  
Author(s):  
Michael K. Berkowitz
Keyword(s):  
Power Grid ◽  
Peak Load ◽  
Grid Economics ◽  
Pricing Framework

scholarly journals Research on Real-time Intelligent Load Control Technology among Giant Hydropower Station Group under High-intensity Peak-load and Frequency Regulation Demand

2018 ◽  
Vol 246 ◽  
pp. 01107
Author(s):  
Wei Luo ◽  
Qingxiang Zhong ◽  
Faying Gu
Keyword(s):  
Real Time ◽  
High Intensity ◽  
Power Grid ◽  
Peak Load ◽  
Load Control ◽  
Water Volume ◽  
Frequency Regulation ◽  
Control Technology ◽  
Cascade Hydropower Stations ◽  
Hydropower Stations

The paper conducts an in-depth study on the real-time dispatching involved in joint operation among giant cascade hydropower stations with high-intensity peak-load and frequency regulation demand, and proposes anintelligent load control technology for cascade hydropower stations in the coordination mode of station and power grid. Aiming to water level safety control of runoff power stations and rapid response to load regulation requirements of the power grid, taking 10 types of constraints such as output, water volume and flow rate into consideration, a model cluster is established through the layered control principle to realize real-time intelligent load allocation and economic operation among Pubugou, Shenxigou and Zhentouba stations. Dadu River has become the first large-scale river basin in China to realize “one-key dispatch” of multiple stations, and has achieved good demonstration effect.

Research on Combined Peak Load Regulation with Hydropower, Thermal Power and Nuclear Power Plants

2014 ◽  
Vol 986-987 ◽  
pp. 465-469 ◽  
Author(s):  
Gang Wang ◽  
Xiao Dong Ma ◽  
Chao Wang ◽  
Peng Ye
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Power Grid ◽  
Thermal Power ◽  
Operation Mode ◽  
Peak Load ◽  
Generating Capacity ◽  
Load Regulation ◽  
Set Up ◽  
Research Show

Base on Nuclear Power Plant (NPP) participating in peak load regulation of power grid, this paper studies the operation mode of hydropower, thermal power and NPP in Combined Peak Load Regulation. The optimization model for Peaking depth of NPP was set up. The case based on actual power grid were calculated and analyzed, results of the research show that in combined peak load regulation of hydropower, thermal power and NPP, a reasonable peaking depth of NPP will effectively alleviate the peaking pressure of power grid, avoid start-stop of thermal power and abandoned water of hydropower, while ensuring the hydroelectric generating capacity in the low load periods, and ensure thermal power output smooth, it further reduce the operating costs, verify the effectiveness of the model.

The Empirical Study in Smart Power Consumption Based on the Adjustment and Control System

2012 ◽  
Vol 241-244 ◽  
pp. 2010-2014 ◽  
Author(s):  
Kun Huang ◽  
Tian Yang Li ◽  
Yong Biao Yang
Keyword(s):  
Empirical Study ◽  
Power Consumption ◽  
Large Scale ◽  
Power Grid ◽  
Peak Load ◽  
Regulation System ◽  
Software Platform ◽  
Commercial Building ◽  
Smart Power ◽  
Power Load

The smart power consumption is an important orientation in peak load shifting and load shedding of power grid in particular time period. It has the significant effect to relieve the load shortage of the power grid. The large-scale electrical devices like central air-condition in commercial building have the great potential in the energy efficiency improvement and available load integration. The effectively regulation of power load in public and commercial construction can improve the stability and reliability of power grid. The power situation in china and the content of empirical study were introduced, and the system hardware design and software platform construction is demonstrated. The function modules of software platform and realization of regulation system are discussed in final.

Research on the Frequency Dynamic Characteristics and UFLS Scheme in Shanghai Subzone Power Grid

2013 ◽  
Vol 291-294 ◽  
pp. 2291-2297
Author(s):  
Wen Qing Yang ◽  
Wei Cao ◽  
Zhi Gang Ding
Keyword(s):  
Dynamic Characteristics ◽  
Power Grid ◽  
Peak Load ◽  
Frequency Characteristics ◽  
Power Grids ◽  
Load Shedding ◽  
Transient Simulation ◽  
Simulation Program ◽  
Equivalent Model ◽  
Ring Network

Shanghai main power grid is operating in 500 kV ring network and with voltage-grading & district-dividing structure, and its subzone power grids have their own frequency characteristics. The paper has used district-dividing single equivalent model to check the parameters of components in BPA transient simulation program, and the original under frequency load shedding (UFLS) scheme was improved. Then the frequency dynamic characteristics of isolated subzone grid is analyzed, so does the adaptability and frequency safety of power grid under the new UFLS scheme in the condition of peak load in the summer of 2011.

Research on New Energy Integration Capacity in Power Grid

2013 ◽  
Vol 448-453 ◽  
pp. 2223-2227
Author(s):  
Jun Chuan Jia ◽  
Bing Zhao ◽  
Xu Zhi Luo
Keyword(s):  
Large Scale ◽  
System Analysis ◽  
Comprehensive Evaluation ◽  
Power Grid ◽  
Peak Load ◽  
Stable Operation ◽  
Energy Integration ◽  
New Energy ◽  
Large Scale Integration ◽  
Scale Integration

Due to their high inter-temporal variation and intermittence, large-scale integration of the new energies, such as wind power and photovoltaic power, will pose great challenges to the safe and stable operation of power system. Analysis on gird stability and adaptability before integrating the new energy should be made. The paper investigates all kinds of restrictions and assesses each constrained capacity from the perspective of steady-state and transient voltage, frequency stability, cross-section transmission limit and peak load regulating capacity, respectively. Then the comprehensive evaluation on the capability to accommodate new energy for a power grid is accomplished. Take a practical grid for example, its accommodation capacity for new energy is calculated based on the above-mentioned method, which provides a theoretical basis for the grid to accommodate new energy and planning and construction of new energy.

scholarly journals Event-Based Under-Frequency Load Shedding Scheme in a Standalone Power System

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5659
Author(s):  
Ying-Yi Hong ◽  
Chih-Yang Hsiao
Keyword(s):  
Power System ◽  
Power Grid ◽  
Peak Load ◽  
Low Frequency ◽  
Computation Time ◽  
Load Shedding ◽  
Power Generators ◽  
Cascading Outages ◽  
Event Based ◽  
Wind Power Generators

Under-frequency load shedding (UFLS) prevents a power grid from a blackout when a severe contingency occurs. UFLS schemes can be classified into two categories—event-based and response-driven. A response-driven scheme utilizes 81L relays with pre-determined settings while an event-based scheme develops a pre-specified look-up table. In this work, an event-based UFLS scheme is presented for use in an offshore standalone power grid with renewables to avoid cascading outages due to low frequency protection of wind power generators and photovoltaic arrays. Possible “N-1” and “N-2” forced outages for peak and off-peak load scenarios in summer and winter are investigated. For each forced outage event, the total shed load is minimized and the frequency nadir is maximized using particle swarm optimization (PSO). In order to reduce the computation time, initialization and parallel computing are implemented using MATLAB/Simulink because all forced outage events and all particles in PSO are mutually independent. A standalone 38-bus power grid with two wind turbines of 2 × 2 MW and photovoltaics of 7.563 MW was studied. For each event, the proposed method generally obtains a result with a smaller shed load and a smaller overshoot frequency than the utility and existing methods. These simulation results verify that the proposed method is practically applicable in a standalone power system with penetration of renewables.

scholarly journals Research on joint optimal scheduling of air conditioning load and electric vehicle under demand response

2021 ◽  
Vol 257 ◽  
pp. 01058
Author(s):  
Haiyu Huang ◽  
Chunming Wang ◽  
Shaolian Xia ◽  
Huaqiang Xiong ◽  
Baofeng Jiang ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Demand Response ◽  
Air Conditioning ◽  
Power Grid ◽  
Peak Load ◽  
Optimal Scheduling ◽  
Peak Shaving ◽  
Energy Internet ◽  
Direct Load Control ◽  
Scheduling Model

As an important part of energy Internet carrier, demand side resources can participate in many interactions with power grid. In order to reduce the peak to valley load difference of power grid, from the perspective of tapping the combined peak shaving potential of air conditioning load and electric vehicles, guided by TOU price and direct load control, this paper proposes an optimal scheduling model with the minimum load difference and the maximum total revenue of users as the objective function. The results show that the joint optimal scheduling strategy can reduce the peak load and eliminate the “secondary peak load” caused by disorderly charging of electric vehicles.

scholarly journals Optimal Control Strategy of Platform Load Oriented to Network and Load Cooperation

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Xuesong Shao ◽  
Gaoying Cui ◽  
Xiao Chen ◽  
Xinrong Ji ◽  
Yongxian Yi
Keyword(s):  
Demand Response ◽  
Power Grid ◽  
Peak Load ◽  
Regional Power ◽  
Active Response ◽  
Response Characteristics ◽  
Flexible Loads ◽  
Flexible Load ◽  
Resource Characteristics ◽  
Grid Operation

In recent years, with the continuous growth of China’s power peak load and the rapid development of renewable energy, a large number of renewable energy sources are connected to the power grid, increasing the uncertainty of power grid operation and posing new major challenges to the power system regulation capacity. Flexible load has the characteristics of wide distribution, fast response, and high economy, which is an important control resource for the future power system. Based on the flexible load of commercial buildings and residential users, this paper studies the resource characteristics and response characteristics, clarifies the resource characteristics and demand response characteristic indexes of commercial and residential users, and establishes the response characteristics model of commercial buildings and residential users. Considering the influence of weather, holidays, incentive mechanism, and other factors on the response of flexible load, the quantitative analysis method of flexible load resource regulation potential for regional power grid dispatching was studied, and the feasibility of flexible load resources directly participating in the load control system was analyzed. Based on the uncertainty and mathematical characterization method of the active response of flexible loads, the optimal combination control strategy of demand response resources was proposed to eliminate the problems of heavy load and overload of regional power grid equipment by using the active response ability of flexible loads. Finally, the IEEE 14-node system is selected for simulation verification, which provides a theoretical basis for alleviating the power grid operation pressure in the peak load period of the power grid in the urban core area, improving the safety and economic operation level of regional power grid dispatching and the utilization rate of power grid equipment assets.

scholarly journals Research on Peak Load Shifting Based on Energy Storage and Air Conditioning Load in Power Grid

2020 ◽  
Vol 546 ◽  
pp. 022021
Author(s):  
Pan Xiao ◽  
Wangyi He ◽  
Houyi Xin ◽  
Tian Kun ◽  
Cui Jia ◽  
...  
Keyword(s):  
Energy Storage ◽  
Air Conditioning ◽  
Power Grid ◽  
Peak Load ◽  
Load Shifting
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