A Phase Angle Adjustment Method of Phase-shifting Transformer Based on Trajectory Sensitivity Method

A technology of phase-shifting transformer and sensitivity method, which is applied in the direction of AC network voltage adjustment, reduction/prevention of power oscillation, flexible AC transmission system, etc., and can solve problems such as inability to make real-time decisions and long data analysis time
CN104821587BInactive Publication Date: 2017-11-14CHONGQING UNIV
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2017-11-14
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A phase angle adjustment method of a phase-shifting transformer based on the trajectory sensitivity method. The specific steps are as follows: 1. Model the high-voltage power system and simplify it to the simplest line model; 2. Add a phase-shifting transformer between two nodes ( PST). By adjusting the phase angle between the two nodes, the voltage of the power consumption terminal can be controlled, thereby adjusting the power flow between the nodes; 3. The trajectory sensitivity method is used to predict and adjust the phase angle, according to the deviation of the current voltage from the optimal voltage To judge the current voltage state, when the algorithm predicts that the offset distance to the next time point is too large and exceeds the safe range, adjust the phase angle in time so that the voltage value at the next time point is within the safe range , to ensure the stability of the voltage; 4. Repeat step 3 for real-time detection and control. The present invention designs a method for adjusting the phase angle of the phase-shifting transformer based on the trajectory sensitivity method. When a fault or interference occurs in the power system, the method is used to adjust the phase angle of the circuit so that the voltage value of the power system is within the safe range. It can ensure the stability of the power system.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of control in smart grids, in particular to a method for adjusting the phase angle of a phase-shifting transformer based on a trajectory sensitivity method. Background technique

[0002] Modern power systems are often on the edge of transient security and stability constraints. The statistics of power system stability failure accidents at home and abroad show that the accident rate of transient stability failures ranks first. However, most of the current transient stability emergency control strategies are formulated based on the expected accident set. Therefore, it is of great significance to strengthen the research on the safety and stability analysis of large power grids.

[0003] At present, there are three main methods for analyzing the transient stability of power systems: time-domain simulation method, direct Lyapunov method, and artificial intelligence method. The transient stability analysis method...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More