Risk assessment of power system secondary devices for power grid operation

2012 ◽  
Author(s):  
Yibin Sun ◽  
Taotao Ma ◽  
Bingfei Huang ◽  
Wei Xu ◽  
Bin Yu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Power Grid ◽  
Grid Operation

scholarly journals The Maximum Scale Analysis of PV Generation Growth based on Power Grid Development

2019 ◽  
Vol 118 ◽  
pp. 02023
Author(s):  
Huang Zonghong ◽  
Wangcheng Long ◽  
Xiang Li ◽  
Xu dongjie ◽  
Zhe Sun
Keyword(s):  
Power System ◽  
Electricity Generation ◽  
Large Scale ◽  
System Development ◽  
Power Grid ◽  
Great Influence ◽  
The Difference ◽  
Grid Operation ◽  
Policy Guidance ◽  
Pv Generation

Since 2010, photovoltaic (PV) was growing rapidly for policy guidance in China. The large-scale PV electricity generation had a great influence on the power grid operation because of the change of the power supply layout. How to analyse the influence is an important matter to power system development. The analysed results will decide the trends of the PV electricity generation in future. Therefore, the Coordination analysis of PV generation growth is crucial to those developments. In this paper, the reasonable plant scale arrangement was discussed based on the difference between peak and valley of power system.

scholarly journals The Application of Artificial Intelligence Technology in Smart Energy

2020 ◽  
Vol 185 ◽  
pp. 01037
Author(s):  
Xiaotao Jiang ◽  
Ming Xin Zhao ◽  
Wei Liu ◽  
Ruo Bing Xu
Keyword(s):  
Artificial Intelligence ◽  
Power System ◽  
Power Flow ◽  
Power Grid ◽  
Operation Mode ◽  
Energy System ◽  
Effective Measure ◽  
New Energy ◽  
Artificial Intelligence Technology ◽  
Grid Operation

At present, the development of energy system tends to be clean and intelligent. China has upgraded the development of smart energy to national strategy. As the core link of energy system, power system is widely used, with strong regulation ability and complex control, especially with the increasing proportion of new energy and various forms of consumption. Now the power system presents the characteristics of complex nonlinearity, strong uncertainty and strong coupling. There are many limitations in traditional modeling, optimization and control technology, and artificial intelligence technology will be an effective measure to solve the control and decision-making problems of complex system. Firstly, this paper analyzes the application prospect of artificial intelligence technology in power system and the application of artificial intelligence technology in power grid operation. It establishes the prediction model of power grid operation mode, the model can help operators of power system quickly adjust the power flow to convergence state, and then greatly improve the calculation efficiency of power grid operation mode.

Design of SVC Damping Controller Based on Biogeography-Based Optimization Algorithm

2014 ◽  
Vol 668-669 ◽  
pp. 470-473
Author(s):  
Wu Gai Yang ◽  
Li Na Ke ◽  
Fei Fei Dong ◽  
Zhi Ping Zheng
Keyword(s):  
Power System ◽  
Optimization Algorithm ◽  
Power Grid ◽  
Time Varying ◽  
Static Var Compensator ◽  
Nonlinear Characteristics ◽  
Subsynchronous Resonance ◽  
Grid Operation ◽  
Safety And Stability ◽  
Damping Controller

On account of that common subsynchronous resonance controllers cannot well adapt to the time-varying and nonlinear characteristics of power system, biogeography-based optimization (BBO) algorithm is introduced to design subsynchronous damping controller optimally based on the mechanism of suppressing SSO by static var compensator (SVC). The simulatied results of Jinjie plant indicate that the subsynchronous damping controller optimized by BBO algorithm can remarkably improve the damping of torsional modals and thus effectively depress the multimodal SSO, ensuring the safety and stability of units and power grid operation.

Power System Risk Assessment Software Design under Impact of Disaster Conditions

2013 ◽  
Vol 441 ◽  
pp. 204-207
Author(s):  
Xiao Long Zhao ◽  
Jian Hua Zhang
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
System Reliability ◽  
Analysis Method ◽  
Short Term ◽  
Multiple Data ◽  
System Risk ◽  
Grid Operation ◽  
Operation Risk ◽  
The Impact

With the Influence of disaster factor on power system reliability become more and more significant, traditional deterministic risk analysis method has been difficult to adapt to power system risk assessment in changing disaster conditions. This paper puts disaster factor into power system risk assessment, and use improved Monte Carlo method to analyze the risk of all possible states of the system. Combined with online short-term assessment technology, based on the integration of multiple data sources, it uses several typical risk indexes for power system risk assessment under the impact of disaster conditions, then shows power grid operation risk, security warning information and weakness information. The system has been applied to practical power system to verify its scientific and practical design.

Novel Indexes and Method for Power Grid Blackout Risk Assessment

2014 ◽  
Vol 556-562 ◽  
pp. 6665-6668
Author(s):  
Xiao Jun Lu ◽  
Kai Wen Zeng ◽  
Shi Wu Liao ◽  
Jin Yu Wen ◽  
En Lu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Risk Evaluation ◽  
Power Grid ◽  
Assessment Method ◽  
Actual System ◽  
Term Operation ◽  
Incident Investigation ◽  
Risk Assessment Method

A set of blackout risk assessment indexes is established according to Electricity Accident (Incident) Investigation Procedures of China Southern Power Grid (CSPG) (pilot) and Guide on Operational Risk Evaluation of CSPG, which can calculate risk values of electricity accidents (incidents). The calculation process is discussed in detail. Based on the proposed indexes and OPA blackout model, a blackout risk assessment method for power system is put forward, with which blackout risk for all 500kV buses in Guangdong Power Grid are evaluated. Weak areas in power system are identified and their inducements are analyzed. The identification results accord with actual system long-term operation experience, which verifies the correctness of the indexes and method.

The Forecasting Track of Power Grid Operation State Based on Risk Assessment

2014 ◽  
Vol 1008-1009 ◽  
pp. 454-460
Author(s):  
Qi Rui Chen ◽  
Da Hai You ◽  
Cheng Long ◽  
Yang Zou ◽  
Jin Hu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Fuzzy Clustering ◽  
Fuzzy Inference ◽  
Power Grid ◽  
Risk Index ◽  
External Environment ◽  
Time Operation ◽  
Real Time Operation ◽  
State Of Power ◽  
Grid Operation

As the interconnected power grid becomes increasingly complicated and external environment is changeable, the difficulty of power grid dispatching is increased. Thus, the forecasting track of power grid operation state based on risk assessment can be used to predict the operation trend of power grid state and provide a reference for real-time operation state and guide power grid dispatching. Based on overall power grid risk index system, the operation trend for a period in the future is predicted to diagnose the state of power grid by using fuzzy inference, fuzzy clustering and AHP. In this paper, Ningxia Power Grid is simulated as an example to describe the forecasting track of its operation state in the next 100 minutes. The results present that the track can be used to analyze the causes, which increase or decrease the risk degree of overall power grid, then major leading factors are specifically analyzed. And the track can be also used as guidance for dispatching operators to take measures. Furthermore, the track is proved to be reasonable.

Research on Voltage Coordinated Control of the Power Plants Connected

2013 ◽  
Vol 846-847 ◽  
pp. 297-300
Author(s):  
Min Xue ◽  
Hui Ping Zheng ◽  
Shu Yong Song ◽  
Chong Zhi Yin ◽  
Wei Wen Duan
Keyword(s):  
Power Plant ◽  
Power System ◽  
Power Plants ◽  
Reactive Power ◽  
Power Grid ◽  
Voltage Control ◽  
Coordinated Control ◽  
Grid Operation

According to coupling phenomenon of reactive power when a power plant is connected to another power plant, reactive power can not be to achieve a reasonable distribution of each power plant,which causes the problem of voltage control. This paper describes the methods of adjusting the parameters of automatic voltage control (AVC) to realize the coordinated control between power plants connected, which makes the voltage of power system to meet the demand of power grid operation.

Risk Assessment of Cascading Failures in Power System Based on Fuzzy Theory

2014 ◽  
Vol 496-500 ◽  
pp. 2733-2736
Author(s):  
Fu Chao Zhang ◽  
Jia Dong Huang
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Fuzzy Theory ◽  
Power Grid ◽  
Cascading Failures ◽  
Fuzzy C Means ◽  
Fuzzy C Means Clustering ◽  
Level Of Risk

This paper makes a grading of the probability of cascading failures using the theory of fuzzy C-means clustering to implement the level of risk assessment. Then from the perspective of power system transient security, use the specific severity functions to grade the probability of cascading failures, and the synthetical severity is graded by fuzzy theory. Finally, synthesizing the probability of cascading failures with the severity of failure, and the level of risk assessment is determined according to the principle of the maximum membership. Finally, taking IEEE 39 system for example, to assess the level of the risk of cascading failures in power grid, thus the rationality and effectiveness of the proposed algorithm are verified.

scholarly journals Impact of the Generation System Parameters on the Frequency Response of the Power System: A UK Grid Case Study

Electricity ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 143-157
Author(s):  
Jovi Atkinson ◽  
Ibrahim M. Albayati
Keyword(s):  
Power System ◽  
Frequency Response ◽  
Power Grid ◽  
Sudden Increase ◽  
Generation System ◽  
System Parameters ◽  
Primary Frequency ◽  
Primary Frequency Response ◽  
The Impact ◽  
System Inertia

The operation and the development of power system networks introduce new types of stability problems. The effect of the power generation and consumption on the frequency of the power system can be described as a demand/generation imbalance resulting from a sudden increase/decrease in the demand and/or generation. This paper investigates the impact of a loss of generation on the transient behaviour of the power grid frequency. A simplified power system model is proposed to examine the impact of change of the main generation system parameters (system inertia, governor droop setting, load damping constant, and the high-pressure steam turbine power fraction), on the primary frequency response in responding to the disturbance of a 1.32 GW generation loss on the UK power grid. Various rates of primary frequency responses are simulated via adjusting system parameters of the synchronous generators to enable the controlled generators providing a fast-reliable primary frequency response within 10 s after a loss of generation. It is concluded that a generation system inertia and a governor droop setting are the most dominant parameters that effect the system frequency response after a loss of generation. Therefore, for different levels of generation loss, the recovery rate will be dependent on the changes of the governor droop setting values. The proposed model offers a fundamental basis for a further investigation to be carried on how a power system will react during a secondary frequency response.

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