Closed-loop system capable of identifying transient stability of power system in real time and performing based on response and control method
A technology of transient stability and power system, applied in the direction of power network operating system integration, information technology support system, climate sustainability, etc., can solve problems such as mismatch
Inactive Publication Date: 2014-12-10
XI AN JIAOTONG UNIV +3
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But in essence, neither of these two implementation methods can get rid of the theoretical limitation of being helpless against "unexpected faults", and "mismatch" phenomenon may occur in both, but the online pre-decision and real-time matching methods are robust to working conditions, resulting in "Mismatch" is less likely to occur
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[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0049] Such as figure 1 As shown, a response-based real-time closed-loop system of power system transient stability in the present invention includes a fault detection unit, a transient stability prediction unit and a control measure formation unit connected in sequence; Whether the power changes suddenly to judge the occurrence of the fault and the moment of removal to start the calculation of the follow-up unit; The balance power state quantity is grouped and the instability index of the power system is calculated to judge whether the system will be unstable; location, issue the corresponding cut-off command.
[0050] A response-based control method for a real-time closed-loop system of power system transient stability, comprising the following steps:
[0051] Step 1: The fault detection unit judges the occurrence and removal tim...
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The invention provides a closed-loop system capable of identifying transient stability of a power system based on response and a control method. The closed-loop system comprises a fault detection unit, a transient stability predication unit and a control measure forming unit, which are connected in sequence, wherein the fault detection unit is used for judging generating and removing moments of a fault according to whether power which is measured by a WAMS (Wide Area Measurement System) in real time is suddenly changed or not; after the fault is removed, the transient stability predication unit is used for grouping generators according to measured power angles, angle speeds and unbalance power state amounts of the generators and calculating an instability index of the power system, thus judging whether the system is instable or not; and after the system is judged to be instable, the control measure forming unit is used for calculating a generator tripping amount and a generator tripping site in real time and sending a corresponding generator tripping command. The closed-loop system is capable of rapidly identifying the transient stability of the power system in real time and applying a suitable emergency control measure to the power system which is about to lose the transient stability in real time so as to keep the stable operation of the power system; and the closed-loop system does not apply the emergency control measure to the system which does not lose the transient stability and can keep the stable operation of the system.
Description
technical field [0001] The invention relates to the technical field of transient stability identification and emergency control decision-making of a power system, in particular to a response-based real-time closed-loop system and control method for transient stability of a power system. Background technique [0002] There are three main ways to realize the transient stability identification and emergency control decision-making system of the power system as follows: [0003] (1) Offline calculation, real-time matching. Most of the stability control systems put into actual industrial operation today are in this mode. It is a strategy table for emergency control through a large number of off-line calculations. The strategy table contains control measures corresponding to some serious faults in the expected operation mode. In the actual power system, the measurement device will always monitor the operation of the system. When a serious fault occurs in the system, the emergenc...
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IPC IPC(8): H02J3/14
CPCY02B70/3225Y04S20/222
Inventor 张保会郝治国马世英宋云亭陈得治陈湘胡雪凯
Owner XI AN JIAOTONG UNIV