Wang L.,Guangdong Power Grid Corporation |
Xu B.-Y.,Guangdong Power Grid Corporation |
Sheng C.,Guangdong Power Grid Corporation |
Zhao Y.-J.,Guangdong Power Grid Corporation |
And 4 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2014
In order to solve the problem that current sampling characteristics of EVCT and MU cannot fulfill the practical demand of power quality analysis such as high-frequency harmonics and voltage transients in digital substations, this paper proposes a new power quality monitoring (PQM) system for digital substation with high sampling rate of 512 points/cycle. By use of new high-sampling-rated EVCT, MU and PQM equipment, the problem of low sampling rate is solved from the beginning of EVCT in process level. Other problems such as retrieving data from both EVCT and traditional transformer, mass data processing derived from high sampling rate, IEC 61850 modeling of digital PQM equipment, automatic calibration of MU and PQM equipment are analyzed and solved at the same time. Calibration result shows that this system can meet the function and accuracy standard and practical application of this system has achieved good results.
Qin R.S.,Yunnan Electric Power Research Institute |
Xu Z.,Yunnan Electric Power Research Institute |
Wang X.,CEIEC Shenzhen Electrical Technology Inc. |
Geng J.W.,CEIEC Shenzhen Electrical Technology Inc.
Advances in Power and Energy Engineering - Proceedings of the 8th Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016 | Year: 2016
Currently, the grid-accessing test of power quality monitoring equipment is mainly executed manually, which will cause some problems such as a heavy workload, low efficiency, data error, etc. Based on the deep analysis of the operation process of the grid-accessing test, an automatic batch test system for power quality monitoring equipment is proposed in this paper. The system supports the automatic control of the standard power source, data acquisition of different kinds of equipment, automatic generation of test report, etc., and can thus actualize a fully automatic test of power quality monitoring equipment and improve the efficiency of the grid-accessing test, which is beneficial for application and promotion. © 2016 Taylor & Francis Group, London.
Yu X.,Henan Electric Power Research Institute |
Li Q.,Henan Electric Power Research Institute |
Du X.,Henan Electric Power Research Institute |
Zhang X.,Henan Electric Power Research Institute |
Wang X.,CEIEC Shenzhen Electrical Technology Inc.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2011
One of the key points for constructing power quality monitoring (PQM) system is uniform communication protocol and data sharing, so development and application of PQM equipment based on IEC 61850 becomes an inevitable trend. PQM deals with various types of data, including steady data, transient data and sequence of event(SOE) etc, each with different communication method and storage demand. Starting from the actual demands of data measurement, data transmission, and data storage in PQM domain, distribution functions in PQM equipment based on IEC 61850 and concrete implementation of function blocks such as measurement, transient event detection, operation and over limit supervision, and data storage etc, are analyzed in detail. The modeling of function is instructive for the design and development of PQM equipment based on IEC 61850. © 2011 State Grid Electric Power Research Institute Press.