Fractional-order PI based STATCOM and UPFC controller to diminish subsynchronous resonance

The power electronic converters and grid‐connected filters were important components of the permanent magnet direct drive wind power generation system whose performance directly determines the quality of wind power generation. In past modeling, analysis, and control studies, capacitive and inductive components were often treated as integral‐order components. However, the inductance and capacitance components in the actual permanent magnet direct drive wind generator were fractional‐order components, and their electrical characteristics will change with the change of order, which had an important impact on the dynamic and static characteristics of the system. In this paper, the mathematical model of the fractional‐order LCL (FOLCL) filter was derived. Through simulation, it could be seen that the FOLCL filter can avoid resonance fundamentally. At the same time, the fractional‐order PI (FOPI) controller was introduced into the machine‐side current converter, and the parameters of the FOPI controller of the outer speed loop and the inner current loop were adjusted by using the time‐domain optimization method. The results showed that the efficiency of the FOPI controller was significantly better than that of the integer‐order PI controller in realizing maximum wind energy capture. It provides theoretical support and practical application value for the stable operation of the wind power generation system.

show abstract

“…The mechanical output power P m and mechanical torque T m of the wind turbine are Equation (4). [10][11][12]…”

Section: Wind Turbine Modelmentioning

confidence: 99%

“…In the motion equation of PMSG is Equation (11), T L and T e , respectively, represented load torque and electromagnetic torque, J is the moment of inertia, and B is the friction coefficient.…”

Section: Permanent Magnet Synchronous Generator Modelmentioning

confidence: 99%

Research on the side converter system of wind power grid based on fractional LCL filter

Huang

Chen²,

Zhou

et al. 2023

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…The voltage of generator and grid current is denoted by v s and i and series voltage injected by SSSC is V se . The mitigation of SSR with classical control is that the generated voltage of fundamental frequency component by the fixed capacitor bank is to be neutralized by generating a complementary componentof voltage using series converter …”

Section: System Model With Ssr (Sssc) Controllermentioning

confidence: 99%

“…Bongiorno et al address the damping of SSR using PI controller‐based SSSC. The injection of the voltage of subsynchronous frequency component in series with a current of the subsynchronous component to damp out SSR is proposed in Thirumalaivasan et al In Koteswara Raju et al, the mitigation of SSR is achieved by using FACTS devices with fractional‐order PI controller in the control circuit. However, proper control strategy with fast response and robust performance is mandatory, with further depth investigations.…”

Section: Introductionmentioning

confidence: 99%

Effect of SSSC-based SSR controller on the performance of distance relay and adaptive approach using synchronized measurement

Raju¹,

Singh

Thakre³

et al. 2018

Int Trans Electr Energ Syst

Self Cite

View full text Add to dashboard Cite

Summary The use of series compensation in a transmission line with capacitors may result in new problems like torsional oscillations in shaft sections of turbine‐generator due to subsynchronous resonance (SSR) when system frequency matches with any one of torsional mode frequency of shaft system during fault or disturbances occur in the transmission line. The subsynchronous current due to SSR during fault also affects the reach of a distance protection system. The diminution of SSR is enhanced by series voltage injection into the power transmission line with static synchronous series compensator (SSSC) from the knowledge of subsynchronous components, extracted from the system. The use of SSSC in transmission line reduces the subsynchronous oscillations, but it adversely affects the distance protection system which leads to an imprecise assessment of fault location, ie, over or under‐reach. This paper investigates the SSR mitigation in the presence of SSSC and its effect on distance protection scheme. A new approach is proposed for mitigating the problems associated with distance protection by using the synchrophasor measurement. The entire study of simulation is investigated by using a 48‐pulse SSSC carried out with Bergeron model of transmission line in PSCAD. The simulation results represent that the suggested adaptive scheme is truthful, reliable, and secure with a change in compensation level of SSSC.

show abstract

“…Static synchronous series compensator (SSSC) is used to control the power flow, damp out power oscillation, and mitigating the subsynchronous resonance (SSR) in transmission lines . In previous studies, the mitigation of SSR is achieved by using FACTS devices with fractional order proportional integral (PI) controller in the control circuit . The insertion of SSSC in the fault loop affects the components of current and voltage (transient and steady state) .…”

Section: Introductionmentioning

confidence: 99%

Adaptive digital distance relay for SSSC‐based double‐circuit transmission line using phasor measurement unit

Raju

Singh

Thakre³

et al. 2018

Int Trans Electr Energ Syst

Self Cite

View full text Add to dashboard Cite

Summary The existence of midpoint series flexible alternating current transmission system (FACTS) devices leads to degrade the performance of mho relay, leading in erroneous estimation of fault location, ie, overreach or underreach for wide variation in network parameters. This research article proposes a novel mho relay algorithm to improve the performance of distance relay in presence of FACTS device using phasor measurement unit (PMU). First, the complete model of transmission system employing static synchronous series compensator (SSSC) and its control strategy is described analytically, where the error introduced in measurement of impedance due to SSSC on the performance of distance relay. Second, a novel mho relay procedure is developed based on PMU to protect the first zone of double‐circuit transmission line for single line‐to‐ground (SLG) fault. The proposed work is analysed and simulated with 48‐pulse SSSC carried out with Bergeron model of transmission line using power system computer‐aided design (PSCAD) computer simulation. Finally, the simulation results represent that the suggested adaptive scheme is truthful, reliable, and secure with change in compensation level of SSSC.

show abstract

Fractional-order PI based STATCOM and UPFC controller to diminish subsynchronous resonance

Cited by 13 publications

References 20 publications

Research on the side converter system of wind power grid based on fractional LCL filter

Research on the side converter system of wind power grid based on fractional LCL filter

Effect of SSSC-based SSR controller on the performance of distance relay and adaptive approach using synchronized measurement

Adaptive digital distance relay for SSSC‐based double‐circuit transmission line using phasor measurement unit

Contact Info

Product

Resources

About