Method for monitoring and managing electrical energy quality of electric distribution network
A power quality, supervision and management technology, applied in the field of supervision and management, can solve the problems of unfavorable supervision and management, irregular procedures and low efficiency, and achieve the effect of strengthening supervision and management and improving the level of safe and economic operation.
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[0015] According to the provisions of national standards and power quality supervision regulations on power quality indicators, power quality indicators include five indicators: frequency, voltage deviation, voltage fluctuation and flicker, three-phase unbalance, and harmonics. Harmonics, voltage fluctuations and flicker, and three-phase unbalance are often caused by the influence of load on the power grid, while the control of voltage deviation and frequency is mainly realized by dispatching based on power flow control, which is less affected by users. No research analysis was performed in the invention.
[0016] 1. Calculation of harmonics
[0017] According to the provisions of the GB / T14549-1993 standard, the limit value of the bus harmonic voltage (phase voltage) at the common connection point is shown in Table 1.
[0018] Table 1 Bus Harmonic Voltage (Phase Voltage) Limits at Common Connection Points
[0019]
[0020] According to the provisions of the GB / T14549-199...
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