Power system risk assessment method based on dynamic power flow

2016 ◽  
Author(s):  
Ye Xiaohui ◽  
Zhong Wuzhi ◽  
Song Xinli ◽  
Cheng Lin
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Power Flow ◽  
Assessment Method ◽  
Dynamic Power ◽  
Risk Assessment Method ◽  
System Risk

scholarly journals Risk Assessment Method for Integrated Transmission–Distribution System Considering the Reactive Power Regulation Capability of DGs

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3040
Author(s):  
Qi Wang ◽  
Dasong Sun ◽  
Jianxiong Hu ◽  
Yi Wu ◽  
Ji Zhou ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Distribution System ◽  
Reactive Power ◽  
Distribution Networks ◽  
Assessment Method ◽  
Fault Analysis ◽  
Power Sources ◽  
Risk Assessment Method ◽  
Power Regulation

High distributed generation (DG) penetration makes the traditional method of equalizing the distribution power system (DPS) to the PQ load bus in the risk assessment of the transmission power system (TPS) no longer applicable. This paper proposes a risk assessment method for an integrated transmission–distribution system that considers the reactive power regulation capability of the DGs. Based on the DG’s characteristics and network constraints, the regulation capacity is mapped to the boundary buses of the distribution networks. Coordinating the relationship between reactive power and active power, the utilization of the regulation capacity is maximized to reduce the load shedding in the fault analysis of the TPS. Simulation results in the integrated transmission–distribution system illustrate that the effective use of the regulation capacity of the DPS can reduce the risk of the TPS. The method can be applied to the reactive power sources planning and dispatching of power system.

Assessment of Power System Risk in Cyber-Attacks in View of the Role Protection Systems

2017 ◽  
Vol 8 (1) ◽  
pp. 184
Author(s):  
Hui Hwang Goh ◽  
Sy yi Sim ◽  
Omar Abdi Mohamed ◽  
Ahmed Farah Mohamed ◽  
Chin Wan Ling ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Power Systems ◽  
Cyber Security ◽  
Circuit Breaker ◽  
Assessment Method ◽  
Cyber Attacks ◽  
Risk Assessment Method ◽  
Protection Systems ◽  
System Risk ◽  
Bus System

<p>This paper presents a risk assessment method for assessing the cyber security of power systems in view of the role of protection systems. This paper examines the collision of transmission and bus line protection systems positioned in substations on the cyber-physical performance of the power systems. The projected method simulates the physical feedback of power systems to hateful attacks on protection system settings and parameters. The relationship between protection device settings, protection logic, and circuit breaker logic is analyzed. The expected load reduction (ELC) indicator is used in this paper to determine potential losses in the system due to cyber attacks. The Monte Carlo simulation is used to calculate ELC’s account to assess the capabilities of the attackers and bus arrangements are changed. The influence of the projected risk assessment method is illustrated by the use of the 9-bus system and the IEEE-68 bus system.</p>

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.

Synthetic Risk Assessment of Catastrophic Failures in Power System Based on Entropy Weight Method

2012 ◽  
Vol 446-449 ◽  
pp. 3015-3018 ◽  
Author(s):  
Jing Feng ◽  
Ying Wang ◽  
Xian Yong Xiao
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Severity Index ◽  
Assessment Method ◽  
Entropy Weight ◽  
Event Sequences ◽  
Risk Assessment Method ◽  
Catastrophic Failures ◽  
Entropy Weight Method ◽  
Weight Method

The synthetic risk assessment method incorporating the severity and the possibility is used to identify the catastrophic event sequences in power system. The weight setting of each severity index is determined by the proposed entropy weight method. Comparing with traditional methods, the entropy weight method can determine the weight coefficients objectively. The simulation results for the WSCC-9 buses system have proved the validity of the proposed method. This method can be used in the practice power system.

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