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Research on Prevention and Control of Cascading Outages Based on PMU Measurement Technology

Author: HuangGaoYong
Tutor: XuYuQin
School: North China Electric Power University
Course: Proceedings of the
Keywords: PMU Static active sensitivity Control point grading Cascading Failures Control and Prevention
CLC: TM732
Type: Master's thesis
Year: 2011
Downloads: 61
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Abstract


In recent years , the world-wide multiple chain failure resulting grid blackouts , This is a wake - up call for the safe and stable operation of the power system . To ensure the security of the power system , stable , reliable operation is the inevitable requirement of social development , the trend of large-scale interconnected power system and electricity market of the research chain failure prevention and control strategies has important theoretical and practical significance . In this paper, the improved N-1 single- cast safety algorithm based on the network topology , the algorithm considering the whole system in the case of the network topology changes and PMU device failure completely observability , through the initial configuration , and redundant configuration and further optimize the allocation of three steps , to achieve the optimal allocation of the PMU measuring device . Second on the definition and classification of the sensitivity analysis . DC power flow model based on the derived node injected power line active power static active sensitivity mathematical model . Verified by simulation , data comparison , the results showed that the sensitivity of the accuracy of the mathematical model of the static active . Finally, a the chain fault prevention and control strategies based on sensitivity analysis , and the control strategy can be divided into three steps . Step 1 : Using DC power flow model based on the PMU improved prevention and control strategies the desired fault before and after initial power flow data , the formation of the high-risk branch active power flow data set , looking to set out the most serious slip . Step 2 : Using the static the active sensitivity mathematical model to calculate the static meritorious sensitivity of each generator and load the overload slip . Static the meritorious sensitivity data of the generator and load control point grading . Third step: select the control points for the initial control amount calculating the initial control amount , then by the related constraints to be optimized to obtain the optimum control amount , this optimum control amount to control the system to achieve the elimination of branch circuit overload purposes. The algorithm can deal with a single line too contained more lines overload both the example simulation analysis , the results verify the effectiveness of the proposed control strategy to achieve the prevention branch passing contained triggered cascading failures of purpose , and thus prevent the grid large area blackout occurred .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication > The operation of the power system
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