DOI QR코드

DOI QR Code

Utilizing Under Voltage Load Shedding Strategy to Prevent Delayed Voltage Recovery Problem in Korean Power System

  • 투고 : 2016.08.05
  • 심사 : 2017.08.21
  • 발행 : 2018.01.01

초록

The presence of induction motor loads in a power system may cause the phenomenon of delayed voltage recovery after the occurrence of a severe fault. A high proportion of induction motor loads in the power system can be a significant influence on the voltage stability of the system. This problem referred to as FIDVR(Fault Induced Delayed Voltage Recovery) is commonly caused by stall of small HVAC unit(Heating, Ventilation, and Air Conditioner) after transmission or distribution system failure. This delayed voltage recovery arises from the dynamic characteristics associated with the kinetic energy of the induction motor load. This paper proposes the UVLS (Under Voltage Load Shedding) control strategy for dealing with FIDVR. UVLS based schemes prevent voltage instability by shedding the load and can help avoid major economic losses due to wide-ranging cascading outages. This paper review recent topic about under voltage load shedding and compare decentralized load shedding scheme with conventional load shedding scheme. The load shedding strategy is applied to an actual system in order to verify the proposed FIDVR mitigation solution. Simulations demonstrate the effectiveness of the proposed method in resolving the problem of delayed voltage recovery in the Korean Power System.

E1EEFQ_2018_v13n1_60_f0001.png 이미지

Fig. 1. Characteristic of Korean power system

E1EEFQ_2018_v13n1_60_f0002.png 이미지

Fig. 2. Voltage variation for ZIP and induction motormodel

E1EEFQ_2018_v13n1_60_f0003.png 이미지

Fig. 3. PMU Installations

E1EEFQ_2018_v13n1_60_f0004.png 이미지

Fig. 4. Centralized scheme procedure

E1EEFQ_2018_v13n1_60_f0005.png 이미지

Fig. 5. Decentralized scheme procedure

E1EEFQ_2018_v13n1_60_f0006.png 이미지

Fig. 6. Not considering induction motor load withoutFIDVR

E1EEFQ_2018_v13n1_60_f0007.png 이미지

Fig. 7. Considering induction motor load with FIDVR

E1EEFQ_2018_v13n1_60_f0008.png 이미지

Fig. 8. Induction motor slip (locked-rotor current)

E1EEFQ_2018_v13n1_60_f0009.png 이미지

Fig. 9. After load shedding (Centralized)

E1EEFQ_2018_v13n1_60_f0010.png 이미지

Fig. 10. After load shedding (Decentralized)

E1EEFQ_2018_v13n1_60_f0011.png 이미지

Fig. 11. Induction motor slip (steady-state motor currentcondition)

Table 1. Review procedure UVLS scheme

E1EEFQ_2018_v13n1_60_t0001.png 이미지

Table 2. Centralized load shedding ― Delay time and amount

E1EEFQ_2018_v13n1_60_t0002.png 이미지

Table 3. Decentralized load shedding ― delay time and amount

E1EEFQ_2018_v13n1_60_t0003.png 이미지

참고문헌

  1. Zhang Yue1, a, Li Xiaoming, "Dynamic Voltage/Var Sensitivity Approach for Improving Fault-induced Voltage Delayed Recovery Problems," International Power, Electronics and Materials Engineering Conference, 2015.
  2. Xiu-xing Yin, Yong-gang Lin, Wei Li, Ya-jing Gu, Peng-fei Lei, Hong-wei Liu, "Sliding Mode Voltage Control Strategy For Capturing Maximum Wind Energy Based on Fuzzy Logic Control," International Journal of Electrical Power & Energy Systems, vol. 70, pp. 45-51, 2015. https://doi.org/10.1016/j.ijepes.2015.01.029
  3. Xiu-xing Yin, Yong-gang Lin, Wei Li, Ya-jing Gu, Hong-wei Liu, Peng-fei Lei, "A Novel Fuzzy Integral Sliding Mode Current Control Strategy For Maximizing Wind Power Extraction and Eliminating Voltage Harmonics," Energy, vol. 85, pp. 677-686, 2015. https://doi.org/10.1016/j.energy.2015.04.005
  4. Xiu-Xing Yin, Yong-Gang Lin, Wei Li, Hong-Wei Liu, Ya-Jing Gu, "Fuzzy-logic Sliding-Mode Control Strategy for Extracting Maximum Wind Power," IEEE Transactions on Energy Conversion, vol. 30, no. 4, pp. 1267-1278, 2015. https://doi.org/10.1109/TEC.2015.2422211
  5. Xiu-xing Yin, Yong-gang Lin, Wei Li, "Predictive Pitch Control of An Electro-Hydraulic Digital Pitch System for Wind Turbines Based on The Extreme Learning Machine," Transactions of the Institute of Measurement and Control, vol. 38, pp. 1392-1400, 2016. https://doi.org/10.1177/0142331215589610
  6. Michael W. Fisher, Ian A. Hiskens, "Phase Boundary Computation for Fault Induced Delayed Voltage Recovery," 2015 IEEE 54th Annual CDC, 2015.
  7. Richard J. Bravo, Robert Yinger, Patricia Arons S. "Fault Induced Delayed Voltage Recovery (FIDVR) indicators," IEEE PES T&D Conference, 2014.
  8. Krishnanjan Gubba Ravikumar, Scott Manson, "Analysis of Fault-Induced Delayed Voltage Recovery Using EMTP Simulations," IEEE PES Transmission and Distribution Conference and Exposition, 2016.
  9. Mingming Du, MinXiao Han, Zhihui Cao; Chu, F., Ei-Kady, M., "Utilizing STATCON to Resolve Delayed Voltage Recovery Problem in SEC-WR," Power and Energy Engineering Conference, APPEEC 2009. Asia-Pacific, 2009.
  10. NERC Technical Reference Group. Fault-induced delayed voltage recovery(FIDVR). Technical report, NERC, 2009.
  11. Y. Lee, B. Park, S. Oh, B. Lee, J. Shin, T. Kim, "Implementation of Under Voltage Load Shedding for Fault Induced Delayed Voltage Recovery Phenomenon Alleviation," Journal of Electrical Engineering and Technology, vol. 9, no. 2, pp. 406-414, 2014. https://doi.org/10.5370/JEET.2014.9.2.406
  12. Prabha Kundur, "Power System Stability and Control," 1994
  13. "Under Voltage Load Shedding Protection," Working Group C-13, System Protection Subcomittee IEEE PES Power System Relaying Committee Draft 4.1. 2003.
  14. Jeonghoon Shin, Suchul Nam, Jaegul Lee, Youngdo Choy, Taekyun Kim, Hwachang Song, "Application of Multi-step Undervoltage Load Shedding Schemes to the KEPCO System," Journal of Electrical Engineering & Technology, vol. 4, no. 4, pp. 476-484, 2009. https://doi.org/10.5370/JEET.2009.4.4.476