Research of an active and reactive power coordinated control method for photovoltaic inverters to improve power system transient stability

2016 ◽  
Author(s):  
Kun Ding ◽  
Jun Liu ◽  
Xu Wang ◽  
Xudong Zhang ◽  
Ningbo Wang
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Reactive Power ◽  
Control Method ◽  
Coordinated Control ◽  
Active And Reactive Power

Nonlinear Coordinated Control of STATCOM and Generator Excitation Based on Improved Dynamic Surface Control Method

2013 ◽  
Vol 385-386 ◽  
pp. 872-876 ◽  
Author(s):  
Wen Lei Li ◽  
Wei Xing Lin
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Passive Control ◽  
Control Method ◽  
Coordinated Control ◽  
Dynamic Surface Control ◽  
Differential Algebraic Equations ◽  
Algebraic Equations ◽  
Dynamic Surface ◽  
Surface Control

For the single machine connected to infinite bus power system with uncertainties, one nonlinear coordinated control scheme for Static Synchronous Compensator (STATCOM) and excitation is proposed in this paper. Firstly, in order to avoid solving the differential algebraic equations (DAEs) model of system, we simplify the DAEs into the classical differential equations, and then a new nonlinear parameter strict feedback model is given. Secondly, in order to make the system achieve the desired results, the controller is designed in two parts based on improved dynamic surface control method (IDSC) and passive control techniques. The theoretical analysis shows that the derived controller can not only attenuate the influences of external disturbances, but also has strong robustness for system parameters variety. The control law obtained is more effective and the system globally and uniformly ultimately bounded can be achieved using full nature of nonlinear dynamic. Lastly, the further simulation results indicate that the proposed controller can ensure transient stability of the power system under large sudden fault.

Coordination Control Strategy for Active and Reactive Power of DFIG Based on Exact Feedback Linearization under Grid Fault Condition

2011 ◽  
Vol 48-49 ◽  
pp. 335-344
Author(s):  
Meng Zeng Cheng ◽  
Zhen Lan Dou ◽  
Xu Cai
Keyword(s):  
Nonlinear Control ◽  
Power System ◽  
Control Strategy ◽  
Feedback Linearization ◽  
Transient Stability ◽  
Reactive Power ◽  
Control Method ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Nonlinear Control Method

In this paper, a control strategy for operation of rotor side converter (RSC) of Doubly Fed Induction Generators (DFIG) is developed by injecting reactive power into the grid in order to support the grid voltage during and after grid fault events. The novel nonlinear control method is based on differential geometry theory, and exact feedback linearization is applied for control system design of DFIG. Then the optimal control for the linearized system is obtained through introducing the linear quadratic regulator (LQR) design method. Simulation results on a single machine infinite bus power system show that the proposed nonlinear control method can inject reactive power to fault grid rapidly, reduce the oscillation of active power and improve the transient stability of power system.

scholarly journals Research on Improving Transient Stability of Power System with Distributed BESS and its Coordinated Control Method

2021 ◽  
Vol 256 ◽  
pp. 01007
Author(s):  
Can Su ◽  
Hao Zhou ◽  
Peng Yan ◽  
Liang Meng ◽  
Ziwei Cheng
Keyword(s):  
Particle Swarm Optimization ◽  
Power System ◽  
Fault Location ◽  
Transient Stability ◽  
Control Method ◽  
Storage System ◽  
Particle Swarm ◽  
Coordinated Control ◽  
High Price ◽  
Swarm Optimization

The feasibility of battery energy storage system (BESS) in ameliorating power system transient stability has been proved. However, the required BESS capacity is large, which leads to high price. Meanwhile, the improving effect is significantly affected by fault location and BESS location. To address the problem, a distributed configuration of BESS, with a coordinated control method, is proposed in this paper. Firstly, an independent double-closed loop decoupling controller is designed for each BESS, so that the BESS unit can realize decentralized control according to its local correlation information. Secondly, particle swarm optimization is applied to optimize the control parameters of the distributed controllers to achieve coordinated control. Simulation results show that the distributed BESS controllers optimized by particle swarm optimization can better coordinate with each other, and the transient stability of the system is significantly improved.

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