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	A coordinated load shedding scheme for both under-voltage and under-frequency load shedding
	She Qingyuan ; Shen Chen ; Qiao Ying ; Tan Wei
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical/ binary decision diagrams Boolean functions frequency stability load shedding power system control power system stability/ under-frequency load shedding scheme under-voltage load shedding scheme emergency control approach power system voltage stability power system frequency stability Boolean expression ordered binary decision diagram OBDD algorithm national natural science foundation/ B8110B Power system management, operation and economics B8110C Power system control B0250 Combinatorial mathematics B0210 Algebra C3340H Control of electric power systems C1160 Combinatorial mathematics C1110 Algebra
中文摘要	Under-voltage and under-frequency load shedding are two common emergency control approaches to ensure the voltage stability and the frequency stability in power systems. Because the under-voltage and under-frequency phenomena are often coupled with each other in practice, single scheme for only one situation is not capable of resolving both frequency and voltage problems at the same time. Therefore, a coordinated load shedding scheme in which both situations are considered is proposed. Adopting the idea of 'searching and verifying', this scheme formulates load shedding as a satisfiability checking problem. First, based on their own complexity, the constraints which are determined by voltage stability and frequency stability requirements are divided into two parts and assigned to either 'searching' or 'verifying' stage respectively. The ones which can be easily depicted by a set of Boolean expressions should be put into the 'searching' stage, while the others should be put into the 'verifying' stage. Second, OBDD algorithm is applied in searching, and the solutions that do not satisfy the constraints in the 'searching' stage are filtered out, therefore, strategy space is reduced. Third, any strategy from the reduced strategy space is further checked by the remaining constraints in the verifying stage in order to get a satisfying control strategy. In the last part of the paper, some simulation results are exhibited to demonstrate the feasibility of the scheme. This work is supported by national natural science foundation of China (No. 50677031, No. 50777032).
语种	中文
出版者	State Power Corporation of China ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78697]
专题	清华大学
推荐引用方式 GB/T 7714	She Qingyuan,Shen Chen,Qiao Ying,et al. A coordinated load shedding scheme for both under-voltage and under-frequency load shedding[J],2010, 2010.
APA	She Qingyuan,Shen Chen,Qiao Ying,&Tan Wei.(2010).A coordinated load shedding scheme for both under-voltage and under-frequency load shedding..
MLA	She Qingyuan,et al."A coordinated load shedding scheme for both under-voltage and under-frequency load shedding".(2010).

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