Dwayne Stradford’s Post

As we move from rotating machine generation to power electronics based, we need to assess our understanding of the grid’s performance. Today the focus is mostly on steady state capacity, but the big outages are often caused by the problems in the shorter time horizons. If you are an IEEE PES member, you can read this for free! “Evaluation of Voltage Stability Assessment Methodologies in Modern Power Systems with Increased Penetration of Inverter-Based Resources”

Continuation of My Previous Post on Importance of Phase Lock Loop Stability in Weak Grids, 1) The IBRs use a PLL to synchronize to the grid. It operates in a grid following technology to derive the grid phase and frequency using a closed loop control system. The PLL voltage phase estimation is used to derive the d and q axis voltages and currents that are fed to the control algorithms. 2) The PLL voltage phase estimation is used to convert the control action (i.e. converter modulation) from d-q to phase quantities. Inaccurate PLL system voltage phase angle results in inaccurate estimation and control of Id and Iq currents (active and reactive current). 3) Following fault clearance, the PLL should regain synchronism sufficiently fast in order to control reactive power to maintain system voltage. 4) In a short period (1-2 cycles following a fault), this critical PLL function becomes even more difficult in weak systems, as the phase angle may have shifted drastically. Hence its results in poor recovery of post fault voltage ( FRT retriggering). 5) Inverter manufacters should ensure PLL stability and ability to withstand large changes in phase angle that are typically experienced under EHV faults. Reference: NERC & EPRI

Discover fresh insights! 👀 The newly released Technical Report 126 (TR126) is shedding light on Voltage Stability Assessment Methodologies within the ever-evolving Power Systems arena. With a growing presence of Inverter-Based Resources, it's crucial to accurately capture voltage stability limits. Interested in learning more? Check out the full report here: https://bit.ly/3ZzLhRe Join the conversation about voltage security in near real-time operation and the significant role of IBRs in voltage stability! #ieeepes #technicalreport #powersystems #voltagestability

🔌 𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱𝗶𝗻𝗴 𝗣𝗼𝘄𝗲𝗿 𝗤𝘂𝗮𝗹𝗶𝘁𝘆: 𝗔 𝗞𝗲𝘆 𝘁𝗼 𝗚𝗿𝗶𝗱 𝗥𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 Power quality (PQ) is crucial for maintaining a stable and reliable electricity supply. At SATEC, we’ve built decades of expertise in PQ monitoring, equipping both utilities and consumers with the tools to identify and manage voltage fluctuations, frequency deviations, and other power disturbances. Our advanced analyzers provide Class A certification, fast transient detection, and comprehensive power quality reports that adhere to global standards like EN50160 and IEEE1159. Discover how we enhance grid stability: https://lnkd.in/dEFZ-wFk #PowerQuality #SmartGrid #EnergyManagement

Discover fresh insights! 👀 The newly released Technical Report 126 (TR126) is shedding light on Voltage Stability Assessment Methodologies within the ever-evolving Power Systems arena. With a growing presence of Inverter-Based Resources, it's crucial to accurately capture voltage stability limits. Interested in learning more? Check out the full report here: https://bit.ly/3ZzLhRe Join the conversation about voltage security in near real-time operation and the significant role of IBRs in voltage stability! #ieeepes #technicalreport #powersystems #voltagestability

With microsecond-level voltage synchronization, SYNCRIS inverters are uniquely designed to help address voltage security and stability in real-time operations.

Case Study: RDI Controls See how these turbine control experts executed a fast, cost-effective retrofit of failing control system: https://op22.co/484daUr

Reliability Standards For IBRs – Part 4 – Workshop In continuation of my blog series on the changes to the North American Electric Reliability Corporation (NERC) landscape for generators, this article covers the Inverter-Based Resources (IBR) workshop NERC will conducted on January 14-16, 2025 for the Reliability Standards in Milestone 3 to address the Federal Electric Regulatory Commission (FERC) Order 901. – https://lnkd.in/gVx3U4-N #NERC #NERCSTANDARDS #IBR #IBRREGISTRATION #FERC #FERCORDER

HIGH-SPEED BUS TRANSFER USING TRANSIENT STABILITY MODE 1.      UNDERSTANDING HIGH-SPEED BUS TRANSFER Voltage decreases or complete supply interruptions represent the most critical problems for the quality of energy supply today. Voltage disturbances with electronic control systems and other sensitive installations can indeed lead to complete loss of production and long stoppage time. High-Speed Transfer Device guarantees an optimum safeguarding of energy supply. The device ensures the continued supply to the consumer through an automatic transfer to a stand-by feeder and protects the subsidiary process from expensive stoppage time. High-speed bus transfers offer numerous advantages, including faster switching, enhanced flexibility, improved reliability, enhanced safety, improved efficiency, and reduced maintenance costs. These benefits make them a preferred choice for modern power systems. 2.      SETTING CRITERIA OF HSBT FOR FAST TRANSFER A significant task of the HSBT is to ensure that when there is an initiation, a minimum short transfer time is achieved, the transient effects of which represent no danger to the connected users during the transfer. The HSBT compares, on a permanent basis, the voltage of the busbar with the voltage of the stand- by feeder. The following synchronicity criteria are generated from out of the monitoring of the voltage amplitudes as well as the difference of the frequency and of the phase angle: ø < ømax Phase angle The phase angle is determined between the voltage of the busbar and that of the stand-by feeder. The limit values for building the synchronicity criteria can be adjusted individually for leading and lagging busbars. A typical setting value is ± 20°. ∆f < ∆fmax Frequency difference The system determines the frequency difference between busbar voltage and the voltage of the stand-by feeder. In view of the transfer process, the frequency difference provided permits indications of the running down behavior of the connected consumers (e.g. of medium-voltage motors) as well as their dynamic loads. The usual factory setting is 1 Hz. Ubusbar > Umin Busbar voltage The value of the busbar voltage plays an important role in the selection of the transfer mode: In   case the busbar lies below a preset value (UMin - usually set to 70 % UNominal), no fast transfer is carried out. #HSBT #TRANSIENT #ETAP

𝐒𝐚𝐲 𝐠𝐨𝐨𝐝𝐛𝐲𝐞 𝐭𝐨 𝐦𝐚𝐧𝐮𝐚𝐥 𝐜𝐚𝐥𝐢𝐛𝐫𝐚𝐭𝐢𝐨𝐧 - 𝐡𝐞𝐥𝐥𝐨 𝐭𝐨 𝐫𝐞𝐦𝐨𝐭𝐞𝐥𝐲 𝐚𝐜𝐭𝐢𝐯𝐚𝐭𝐞𝐝, 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐜𝐚𝐥𝐥𝐲 𝐚𝐧𝐝 𝐟𝐮𝐥𝐥𝐲 𝐜𝐚𝐥𝐢𝐛𝐫𝐚𝐭𝐞𝐝 𝐥𝐨𝐚𝐝 𝐦𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠 𝐬𝐲𝐬𝐭𝐞𝐦𝐬. Calibration of load monitoring systems before final turbine commissioning is essential, yet normally a manual and time-consuming process. With Polytech’s 𝐀𝐮𝐭𝐨𝐧𝐨𝐦𝐨𝐮𝐬 𝐁𝐞𝐧𝐝𝐢𝐧𝐠 𝐌𝐨𝐦𝐞𝐧𝐭 𝐂𝐚𝐥𝐢𝐛𝐫𝐚𝐭𝐢𝐨𝐧 (𝐀𝐁𝐌𝐂) 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲, you can perform an easier and more time-and cost-effective calibration without human interaction or physical site visits, and even during high wind events. In addition to initial calibration ABMC also allows continuous calibrations to ensure that the full accuracy is kept throughout the turbine lifetime. Read here how ABMC makes calibration easier 👇 https://lnkd.in/eMKGmFiz