Closed-loop control method on basis of response information for complicated power systems
A power system and response information technology, applied in the field of closed-loop control of complex power systems based on response information, can solve the problems of reliability of simulation results and difficulty in obtaining accurate model parameters.
Inactive Publication Date: 2015-04-08
XI AN JIAOTONG UNIV
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These two methods are based on the expected large disturbance accident set, the judgment of stability and the formulated control strategy depend on the closeness between the actual disturbance and the accident set, and depend on the simulation calculation method of the system model and parameters, while the system The model (especially the load model) and parameters (especially the regulator response parameters) are difficult to obtain accurately (the system is constantly developing), so there are credibility problems in the simulation results
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[0050] Such as figure 1 As shown, in the WEPRI36 system, the fault setting is that a three-phase short-circuit ground fault occurs between bus 31 and bus 33 near the side of bus 33, and the line is tripped in 0.19 seconds. According to the strategy table, 30% of the output of the G8 generator is cut off at 0.35 seconds.
[0051] Such as figure 2 As shown, in normal operation, the control sub-station collects and saves the real-time data measured by each measurement unit, and uploads the data to the control master station.
[0052] Power mutations were detected at 0s, 0.19s, and 0.35s, respectively, and closed-loop control was started 0.35s after the last network operation.
[0053] Carry out real-time grouping according to the compound power angle at this time. At 0.5s, the leading group S is G7 and G8 generators, and the lagging group A is G1, G2, G3, G4, G5, G6 generators, and two indicators are passed are greater than zero, it is judged that the system will be unstable, ...
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The invention discloses a closed-loop control method on the basis of response information for complicated power systems. The closed-loop control method includes enabling collecting and measuring units of control master stations to predict power angles of various power generators at a next moment according to post-failure measured response of the various power generators, sorting the power angles according to the sizes of gaps of the power angles, dividing the power angles into a leading group and a lagging group and predicting the transient stability between the two groups; computing required reduction of power generation and units with reduction of power generation in the leading group for the certain systems of the two groups in real time, and keeping the systems to run stably after reduction of power generation is executed; keeping the systems which are not about to lose the transient stability to run stably without emergency control measures. The certain systems of the two groups are about to lose the transient stability. The closed-loop control method has the advantage that the closed-loop control method can be used for carrying out online real-time closed-loop control for the complicated power systems.
Description
technical field [0001] The invention relates to a closed-loop control method of a power system, in particular to a closed-loop control method of a complex power system based on response information. Background technique [0002] At present, the architecture of the security and stability emergency control system in the power system is generally composed of a front-end unit for decentralized measurement and execution control, and a control center for centralized decision-making via a high-speed, dedicated communication network. The front unit is a digital measurement, communication and control device based on a microcomputer, and the master station of the control center is a dedicated computer network workstation. The network technology that constitutes the emergency control system is mature. [0003] At present, there are two main methods for formulating and putting into use emergency control strategies in the power system. 1: A large number of large disturbance scenarios are...
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IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/001H02J3/38H02J3/46
Inventor 张保会王怀远杨松浩郝治国
Owner XI AN JIAOTONG UNIV