An On-line Rapid Evaluation Method of Transient Security and Stability by Enumerating Combined Successive Fault Sets
A transient, safe and stable, cascading failure technology, applied in the direction of load forecasting, AC network circuits, electrical components, etc. in the AC network, it can solve the large-scale cascading failure set and cannot complete the enumeration and combination of the cascading failure set within 5 minutes. Temporary stability assessment, etc.
Active Publication Date: 2017-01-25
STATE GRID CORP OF CHINA +4
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[0005] The purpose of the present invention is: for the large-scale enumerated combination successive fault sets with a time interval of minutes in the large power grid, based on the existing cluster computing technology and transient security and stability online evaluation technology, the enumerated combination cannot be completed within 5 minutes The problem of transient stability evaluation of successive fault sets is proposed, and a solution is proposed, so as to realize the temporary stability online rapid evaluation of enumerated and combined sequential fault sets of large power grids, and to deal with the temporary stability of power grids caused by successive faults in a short period of time for dispatching and operation control personnel. Provide technical means for the risk of state security and stability
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[0020] The present invention will be described in further detail below with reference to the accompanying drawings and examples.
[0021] Assume that the enumerated combination successive failure set F 0 The number of expected failures in the middle is K, and the K expected failures are numbered from 1, then enumerate the combination of successive failure sets F 0 for {f ij , i=1, 2,..., K; j=1, 2,..., K; i≠j}, there are K(K-1) consecutive fault combinations, where i represents F 0 The number of the first expected fault in the consecutive fault combination, j represents F 0 The number of the second expected fault in the successive fault combination, f ij Represents the sequential fault combination formed by the combination of the first predicted fault numbered i and the second predicted fault numbered j.
[0022] figure 1 In step 1, it is described that for the current operating state S of the power system 0, based on the cluster computing platform, the calculation sched...
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The invention discloses a method for quickly evaluating the transient security and stability of an enumerated combined successive fault set on line, and belongs to the technical field of security and stability analysis of a power system. The method comprises the following steps: considering temporary stability margin estimation of power grid operation state change, and estimating temporary stability margin of a second fault in a stable operation state after a first fault of a successive fault combination; then, sequencing a successive fault set from small to large according to a temporary stability estimation value, preferentially performing temporary stability quantitative evaluation on the front successive fault combinations for the second fault in the stable operation sate after the first fault until temporary stability margins of a plurality of successive fault combinations with continuous sequencing numbers are larger than 0, and then directly judging that the back successive fault combinations are all in transient security and stability states, thereby realizing online quick evaluation of the transient security and stability of the enumerated combined successive fault set. According to the method, the requirement of quickly evaluating the transient security and stability of the enumerated combined successive fault set of a large power grid on line within five minutes can be met.
Description
technical field [0001] The invention belongs to the technical field of power system safety and stability analysis. More precisely, the invention relates to a transient safety and stability on-line rapid evaluation method suitable for enumerated and combined successive failure sets whose occurrence time interval is minute level. Background technique [0002] With the continuous expansion of the scale of the power system and the grid-connected scale of new energy power generation, and the gradual advancement of the power market, the operating status of the power system changes more and more frequently, and the safety and stability characteristics of the power system become more complex. An essential function for scheduling operation control. In order to realize the safety and stability online assessment, especially the transient safety and stability (referred to as transient stability) online assessment, the calculation speed is the key, and usually requires that the safety an...
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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001H02J3/003H02J2203/20
Inventor 徐泰山鲍颜红黄志龙徐伟刘强曹路周海锋高凯何晓洋张艳军
Owner STATE GRID CORP OF CHINA