Author: Chang, J.-C.
Paper Title Page
WEPPD039 Status of the Utility System Construction for the 3 GeV TPS Storage Ring 2597
 
  • J.-C. Chang, W.S. Chan, J.-R. Chen, Y.F. Chiu, Y.-C. Chung, K.C. Kuo, Y.-C. Lin, C.Y. Liu, I. Liu, Z.-D. Tsai, T.-S. Ueng
    NSRRC, Hsinchu, Taiwan
 
  The construction of the utility system for the 3.0 GeV Taiwan Photon Source (TPS) was started in the end of 2009. The utility building for the TPS ring will be completed in the end of 2011. The whole construction of the utility system is scheduled to be completed in the end of 2012. Total budget of this construction is about four million dollars. This utility system presented in this paper includes the electrical power, cooling water, air conditioning, compressed air and fire control systems.  
 
WEPPD040 Power Saving Schemes in the NSRRC 2600
 
  • J.-C. Chang, Y.F. Chiu, Y.-C. Chung, Y.-C. Lin, C.Y. Liu, Z.-D. Tsai, T.-S. Ueng
    NSRRC, Hsinchu, Taiwan
 
  To cope with increasing power consumption and huge power bill of the Taiwan Photon Source (TPS) in the near future, we have been conducting several power saving schemes in the National Synchrotron Radiation Research Center (NSRRC) for years. This paper illustrates the power saving results and future schemes. The power saving schemes include optimization of chillers operation, power requirement control, air conditioning system improvement, application of heat pump, and the lighting system improvement.  
 
WEPPD041 The Strategy between High Precision Temperature Control and Energy Saving for Air-Conditioning System 2603
 
  • Z.-D. Tsai, W.S. Chan, J.-C. Chang, C.S. Chen, Y.-C. Chung, C.W. Hsu, C.Y. Liu
    NSRRC, Hsinchu, Taiwan
 
  In the Taiwan Light Source (TLS), several studies related to the temperature stability for air conditioning system continued to be in progress. Using new control philosophy can minimize temperature variations effectively. A high precision temperature control within ±0.05°C for air condition system has been conducted to meet the more critical stability requirement. Due to the importance of energy saving issue, the power consumption of air conditioning system was also upgraded and intended to reduce extensively. The paper addresses some experience between high precision temperature control and energy saving about operation of air conditioning system. The significant improvements proven that both targets can achieve simultaneously.  
 
WEPPD042 The Grounding System at TPS 2606
 
  • T.-S. Ueng, J.-C. Chang, J.-R. Chen, Y.-C. Lin
    NSRRC, Hsinchu, Taiwan
 
  An elaborately designed grounding system has been installed under the TPS construction site. The ground grid was installed sector by sector to comply with the building construction schedule. The ground resistance measurement of each sector was carried out right after the grid installation. The final ground resistance measurement for the whole grounding system was performed also right after its completion. The measured ground resistances of each sector were used to estimate the final TPS ground resistance, and it was compared to the final TPS ground measurement result. Also, the analysis with computer software is used to justify it. The low impedance of TPS grounding system, < 0.15 ohm, is to insure the safety of TPS personnel and instrumentation, also, to reduce the noise of electronic devices.  
 
WEPPD043 The Studies of Power System Harmonics at TLS 2609
 
  • T.-S. Ueng, J.-C. Chang, Y.F. Chiu, K.C. Kuo, Y.-C. Lin
    NSRRC, Hsinchu, Taiwan
 
  The power system harmonic distortion in the utility system of NSRRC is investigated for improving the power system performance. The monitored power quality data at the point of common coupling is examined and compared with industrial standards. In addition, the harmonic characteristics of electric power for the accelerator magnets and adjustable speed drives which contribute the most harmonics are analyzed. Furthermore, the approach to mitigate the harmonic effects for improving the power quality is studied.  
 
THPPD058 Reduction of Conductive EMI Noise Resulted from the Commercial Power Supply 3644
 
  • C.S. Chen, C.K. Chan, J.-C. Chang, Y.L. Chu, K.H. Hsu, C.Y. Kuo, Y.-H. Liu, C.S. Yang
    NSRRC, Hsinchu, Taiwan
 
  Almost every electronic equipment must be connected to power system. Because of the complexity of power lines, the reduction of conductive electro-magnetic interference (C-EMI) plays an important role in precise measurements. In this paper, a line impedance stabilization network (LISN) was built up to get the spectrum from power lines. After several measurements by some commercial power supplies, it is found that some of these power supplies induce effectively C-EMI into power lines, even if a passive filter is bound in power line. These noises may influence numerous equipments in a local area near the sources. Therefore, how to choose a suitable filter is a decisive factor to reduce the magnitude of C-EMI.  
 
THPPD059 Conductive EMI Reduction to Kicker Magnet Power Supply in NSRRC 3647
 
  • Y.-H. Liu, J.-C. Chang, C.S. Chen, H.H. Chen, J.-R. Chen
    NSRRC, Hsinchu, Taiwan
 
  The purpose of this paper is to estimate and reduce the conductive Electromagnetic Interference (EMI) from kicker magnet power supply in TLS. A LISN system was conducted to measure the EMI spectrum of kicker power supply. The EMI noise exceeded FCC standards in some frequency range especially during kicker firing. Reducing EMI level by using different EMI filters were applied. Double pi filter was more efficient than single pi filter. After using filter, the conducted EMI could diminish lower than FCC class B. The experimental results will provide useful information to future TPS pulsed magnet design.