scholarly journals Research on a Power Grid Cascading Failure Prevention and Control Method considering WSN

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Huiqiong Deng ◽  
Junyuan Wu ◽  
Jie Luo ◽  
Renwu Yan ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Control Method ◽  
Low Cost ◽  
Power Grid ◽  
Dynamic Monitoring ◽  
Cascading Failures ◽  
Monitoring Methods ◽  
Preventive Control ◽  
Operation Parameters ◽  
Grid Operation ◽  
And Control

The practical application of wireless sensor networks (WSNs) in hot fields is summarized. It is found that compared with traditional monitoring methods, it has better adaptability to complex environments and low cost. It is suitable for monitoring power grid operation parameters. Therefore, this paper combines the above network and cascading failures, analyzes its 24-hour continuous and dynamic monitoring of the operation parameters of the power grid, and considers how to use the obtained parameters to analyze the disturbance of the remaining lines after the initial fault of the power grid. To prevent cascading failures in the power grid, a preventive control model considering safety and economy is proposed, and the model is solved by nondominated sorting genetic algorithm II and particle swarm optimization (NSGA2-PSO). Finally, the rationality of this method is verified in the IEEE39 node system.

scholarly journals Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 634 ◽  
Author(s):  
Yang Li ◽  
Zongxia Jiao ◽  
Zimeng Wang
Keyword(s):  
Phase Difference ◽  
Dynamic Characteristics ◽  
High Efficiency ◽  
Control Method ◽  
Low Cost ◽  
Detailed Structure ◽  
Actuation System ◽  
And Control ◽  
Valve Control ◽  
Direct Pump

In order to provide a simplified and low-cost solution of the terminal for a distributed actuation system, this paper proposes an electro-hydrostatic actuator (EHA) based on the linear drive principle. The proposed actuator is directly driven by a linear pump with a collaborative rectification mechanism, whose performance relies on the collaboration of the internal two units. A pair of linear oscillating motors are employed to drive the two pump units respectively. The control of the actuator is based on the modulation of the oscillating amplitude, frequency, and phase difference of the two motors. The advantage of this actuator is that no more valve control is needed to rectify the linear pump besides the high efficiency of the direct pump drive. In this paper, both schematic and detailed structure of the actuator is presented. The kinematic and dynamic characteristics are analyzed and modeled, based on which the control method is proposed. The experiments verify the validity of the actuator structure and control.

A Survey on Communication Technology of Smart Grid

2013 ◽  
Vol 749 ◽  
pp. 603-605
Author(s):  
You Jie Ma ◽  
Pan Long Jin ◽  
Xue Song Zhou
Keyword(s):  
Smart Grid ◽  
Communication Technology ◽  
Technology Use ◽  
High Speed ◽  
Control Method ◽  
Power Grid ◽  
Monitoring And Control ◽  
It Use ◽  
Electricity Grid ◽  
And Control

Modern power grid is an important part of national energy strategy. Smart grid is one of the directions to modernize the electricity grid. Smart grid is the intelligent of power system, It is also known as the grid 2.0.It is based on integrated, high-speed bidirectional communication network ,It use the advanced sensor and measuring technology, use advanced equipment and control method to realize the application of the power grid reliability, safety, economic, efficient, environmental friendly and safety. High speed, bidirectional, real-time, and integrated communication system is the foundation and key point when monitoring and control smart grid. So How to improve the communication technology is very important.

scholarly journals Research on Dynamic Monitoring and Early Warning Model of Fund for Power Grid Infrastructure Projects

2021 ◽  
Vol 245 ◽  
pp. 01059
Author(s):  
Qian Gao ◽  
Yuchun Han ◽  
Junyi Yang ◽  
Guiqin Zhang ◽  
Yu Hong ◽  
...  
Keyword(s):  
Early Warning ◽  
Process Management ◽  
Power Grid ◽  
Dynamic Monitoring ◽  
Grid Infrastructure ◽  
Early Warning Model ◽  
Whole Process ◽  
And Control ◽  
Warning Model ◽  
Monitoring And Early Warning

In order to strengthen the all-round and whole process management and control of the project, improve the quality of statistical data, support the high-quality development of the company and power grid, and identify the mismatch between the progress of fund payment and the progress of project site construction and cost accounting. Through the research on the dynamic monitoring and early warning model of power grid infrastructure project funds, the problems existing in the fund settlement and payment management of power grid project in the process of project implementation are accurately revealed, and the project fund payment risk is prevented.

The Research and Simulation for Control Method of Active Power Filter

2013 ◽  
Vol 313-314 ◽  
pp. 1087-1091
Author(s):  
Hai Bo Zhou ◽  
Qiu Yan Liang ◽  
Hong Bo Li
Keyword(s):  
Compensation Effect ◽  
Control Method ◽  
Power Grid ◽  
Active Power Filter ◽  
Active Power ◽  
Simulation Software ◽  
System Model ◽  
Current Harmonics ◽  
Power Filter ◽  
And Control

the control strategy has a direct impact on the performance of active power filter. Creating system model in the simulation software to research and analyze. Results show that the hysteresis comparison control method can track the harmonic current accurately, and control inverter circuit generate compensation current quickly and accurately. And doing spectrum analysis for the power grid currents before, the spectrum figures show that the power grid current harmonics has been suppressed greatly, and the compensation effect is very significant.

scholarly journals Control Method of Buses and Lines Using Reinforcement Learning for Short Circuit Current Reduction

2020 ◽  
Vol 12 (22) ◽  
pp. 9333
Author(s):  
Sangwook Han
Keyword(s):  
Reinforcement Learning ◽  
Power Systems ◽  
Large Scale ◽  
Control Method ◽  
Short Circuit ◽  
Power Grid ◽  
Short Circuit Current ◽  
Control Methods ◽  
Grid Operation ◽  
Short Circuit Currents

This paper proposes a reinforcement learning-based approach that optimises bus and line control methods to solve the problem of short circuit currents in power systems. Expansion of power grids leads to concentrated power output and more lines for large-scale transmission, thereby increasing short circuit currents. The short circuit currents must be managed systematically by controlling the buses and lines such as separating, merging, and moving a bus, line, or transformer. However, there are countless possible control schemes in an actual grid. Moreover, to ensure compliance with power system reliability standards, no bus should exceed breaker capacity nor should lines or transformers be overloaded. For this reason, examining and selecting a plan requires extensive time and effort. To solve these problems, this paper introduces reinforcement learning to optimise control methods. By providing appropriate rewards for each control action, a policy is set, and the optimal control method is obtained through a maximising value method. In addition, a technique is presented that systematically defines the bus and line separation measures, limits the range of measures to those with actual power grid applicability, and reduces the optimisation time while increasing the convergence probability and enabling use in actual power grid operation. In the future, this technique will contribute significantly to establishing power grid operation plans based on short circuit currents.

The Constant Voltage Composite Control Method of the SVC with Unbalanced Load Compensation

2014 ◽  
Vol 986-987 ◽  
pp. 1332-1336
Author(s):  
Yun Shan Zhang ◽  
Yu Jie Pei ◽  
Jian Guo Xu ◽  
Yao Ding Gu ◽  
Jun Dong ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Power Grid ◽  
Access Point ◽  
Constant Voltage ◽  
Reactive Control ◽  
Load Compensation ◽  
Evaluation Point ◽  
Unbalanced Load ◽  
Grid Operation

in practical application of SVC, unbalanced load system exists on many sites, and the voltage at system access point is required to meet the demand of power grid operation. This paper describes a SVC constant voltage control method for an unbalanced load system. the control algorithm controls the voltage at evaluation point to reach the preset range while compensating reactive power of unbalanced load system. the control method could compensate an unbalanced load system into a balanced system, at the same time, the voltage at access point could meet the demand of power grid operation. This control method is particularly applicable to reactive control requirements of steel mills, wind power, solar power grid systems. This algorithm has been applied in Lishizhai 66kV SVC Project in Fushun, inhibits three-phase unbalance of the grid, has achieved good compensation effect.

scholarly journals SPWM Smoothing Control Method Based on Wind Power Grid Connection

2021 ◽  
Vol 257 ◽  
pp. 01052
Author(s):  
Zixu Fan ◽  
Xingjun Tian ◽  
Tong Zhao ◽  
Zihang Tan ◽  
Chaozheng Xu
Keyword(s):  
Power Generation ◽  
Wind Turbine ◽  
Wind Power ◽  
Control Method ◽  
Power Grid ◽  
Electric Energy ◽  
Wind Power Generation ◽  
National Standards ◽  
Duty Ratio ◽  
Grid Operation

Energy is the foundation of economic development and technological development. Facing the present situation of non-renewable energy decline, wind power generation has been developed rapidly. However, the problem of unstable output voltage of wind power generation due to unstable wind speed needs to be solved, and traditional solutions cannot make the generated electric energy meet the national standards for grid-connected and off-grid operation. In this paper, the electric energy generated by wind turbine is rectified by bridge rectifier circuit and using large capacity capacitor filtering to generate DC with flat waveform. Then, using SPWM inversion technology, the normal rotation wave with the same frequency as the power grid is used as the modulation wave and according to the required voltage amplitude, and the triangle wave with appropriate duty ratio is calculated by SPWM smoothing control theory as carrier wave. Subsequently, accurate filtering is carried out and grid-connected and off-grid operation is carried out through the self-aligning device. Finally, with the help of MATLAB simulation platform, the wind turbine is simulated to work under different wind conditions, and whether the generated electric energy meets the grid-connected and off-grid operation standards is judged, which further determines the reliability and authenticity of the theory.

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