Design and Analysis of DFIG-STATCOM Coordinated P2P Grid Connected System Using RMSProp

Abstract

This research work establishes a relationship between STATCOM and DFIG wind turbines in a transmission network for coordinated operation during grid disturbances. A change in wind gust also produces a variable output nonlinearly, thereby making the system unstable. Assuring bus voltage and proper balance of load angle in all the connected generating stations becomes challenging. Therefore, increasing voltage security at all the lines and further enhancing system stability leads to the placement of STATCOM at the proper location in the transmission line. Appropriate coordinated control of STATCOM and DFIG can lead to adequate power flow in the system. This research includes a multi-objective optimization problem for properly tuning the PI- controller. The voltage at the controlled bus, low-frequency oscillating waveforms, and real power available at the bus under pre-fault and post-fault conditions are identified as objective function parameters. To avoid the overgrowth of error inside the search space due to lack of normalization, this method uses the RMSProp algorithm for proper convergence in the state vector. The coordinated control action has been investigated in the different shunt fault conditions. Again, to enhance the system stability, low voltage ride-through capability has been thoroughly verified using Matlab software.

Reactive Power Management at PCC with DFIG Based Wind Energy System

“…Different topologies of DFIG's are proposed by various researches and all the topologies there is reactive power requirement that need to be met for successful operation of DFIG. To compensate for the reactive power, many researchers [3][4][5][6][7][8][9][10][11][12][13][14][15] have proposed STATCOM at strategic locations in the transmission system or at PCC. A shunt connected STATCOM using vector controlled technique is employed in distribution system for weak connected grid and it was concluded that STATCOM compensated for reactive power requirement effectively during grid faults and sudden load switching OFF conditions [4,5].…”

“…To compensate for the reactive power, many researchers [3][4][5][6][7][8][9][10][11][12][13][14][15] have proposed STATCOM at strategic locations in the transmission system or at PCC. A shunt connected STATCOM using vector controlled technique is employed in distribution system for weak connected grid and it was concluded that STATCOM compensated for reactive power requirement effectively during grid faults and sudden load switching OFF conditions [4,5]. [6] explored the application of STATCOM to overcome of Low Voltage Ride Through issue in DFIG based systems due to internal fault of converters in addition to grid faults.…”

Application of Static Synchronous Compensator (Statcom) as Reactive Power Control in Dfig Wind Farm and Grid Interconnection Systems

“…DFIG can be directly connected to the AC power grid and remain constantly synchronized. This includes the capacity to sustain power electronics devices in wind turbines while controlling the power factor [3], [8], [14]- [16] The most difficult aspect of maximizing a wind farm is creating an accurate model of the wind farm. In addition, a significant number of parameters must be tuned to ensure good and stable interaction between the wind farm and the power grid at the common coupling point (PCC).…”

“…STATCOM operates by creating reactive electricity in accordance with system needs. Utilizing STATCOM in a wind energy system can increase system performance and decrease reactive power fluctuations [3], [16]- [18]. This work uses STATCOM compensators to optimize DFIG on wind farms that are gridconnected.…”

Enhancement of Direct Power Control by Using Artificial Neural Network for a Doubly Fed Induction Generator-Based WECS: An Experimental Validation

“…In the field of wind energy, several generators can be used to generate electric current; asynchronous generators [14], synchronous generators [15], DC generators [16], and DFIG [17] can be used. However, DFIG remains the most important and most widely used of these types as a result of its ease of command, low cost, durability, and low maintenance compared to some other generators.…”