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Study on Controlling Power Quality
Based on Thermodynamics Modeling Method
for 6.3kV Power System
Liguo Wang ∗,∗∗ , Jian Liu, Shibo Zhang, and Dianguo Xu
Dept.of Electrical Engineering, Harbin Institute of Technology,
Harbin 150001, Heilongjiang Province, China
wlg2001@hit.edu.cn
Abstract. Based on controlling the power quality of the 6.3kV power system of
a coal mine in North China, a topology consist of Passive Power Filter (PPF),
Thyristor Switched Capacitor (TSC) and Fixed Compensation Capacitor (FC)
has been studied. Combining the thermodynamics modeling theory with
network topology analysis method, the parameters of PPF, TSC and FC was
proposed and optimized. Though there is a 5.th single tuning filter only, the
measured results show that the average harmonic current injected into the
power system completely accord with Chinese national standard GB/T-14549-
93 and the power factor is increased to 0.99 without any possibility of over-
compensation or under-compensation. Due to the action of the PPF the negative
effect that caused by zero-voltage-switch of TSC was eliminated by proposed
topology. The study of this paper gives the corner stone of theory and method
for realizing smart grid system with Chinese characteristics.
Keywords: power quality, thermodynamics modeling, PPF, TSC.
1
Introduction
The concept of smart power grid, which was presented by Mark Kerbel in 2005, is
essentially obtaining the feedback from the consumers via intelligent meters, and
taking advantage of the advanced measuring, telecommunication, computer and
automation technology, in order to achieve the closed-cycle control among the
electricity transmission, transforming and using, and enhance the robustness, self-
healing, adaptability, efficiency and compatibility of the power systems. Until now,
the Smart Power Grid is still in its primary stage all over the world. Council of the
European Union pointed out explicitly in 2006 that Smart Power Grid is the key to
guarantee a sustainable, competitive and secure power quality. After the Boulder,
Colorado becoming the first Smart Grid City in April 2008, the Google and the GE
 
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