Electric energy charging method considering harmonic wave electric energy loss of load

Abstract

The invention relates to an electric energy charging method considering the harmonic wave electric energy loss of a load. The method comprises steps as follows: step 1, the harmonic wave electric energy loss of a single-phase rectification load is determined: S1, a load frequency domain harmonic wave analytical model is established; S2, according to the load frequency domain harmonic wave analytical model, each sub-harmonic current on the alternating current side of the load is determined in combination with the voltage harmonic wave condition at the single-phase rectification load end; S3, an active power analysis formula and a reactive power analysis formula of each sub-harmonic wave of the load are acquired on the basis of each sub-harmonic current on the alternating current side of the single-phase rectification load; S4, the harmonic wave electric energy loss of the single-phase rectification load is acquired; step 2, the actual electric energy consumption of the single-phase rectification load is the difference between the measured electric energy consumption of the single-phase rectification load and the harmonic wave electric energy loss of the single-phase rectification load, and then the actual electric charge of the single-phase rectification load is acquired according to the current market price of electric energy. The method considers the harmonic wave electric energy loss of the load, so that compared with the prior art, the method can accurately charge the electric energy consumed by the load.

Description

technical field [0001] The invention relates to the technical field of electric energy billing, in particular to an electric energy billing method that takes into account the harmonic electric energy loss of loads. Background technique [0002] The electric energy metering of the existing power system is usually directly billed through the electric meter, and with the development of power electronic technology, the electrical equipment using switching power supply and frequency conversion device has been widely used, the number of harmonic source loads and There are more and more types, such as desktop computers, compact fluorescent lamps, LCD TVs, washing machines, refrigerators, etc., which have caused major changes in the structure of electricity loads in modern power systems. These nonlinear loads realize industrial energy saving through power control, but at the same time, a large number of harmonics will be injected into the grid, which will distort the system voltage ...

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Problems solved by technology

On this basis, some scholars deduced the instantaneous power of nonlinear loads, and gave the conclusion that the AC components of instantaneous power only contain 3, 6, 9... sub-harmonics, and the active power is the DC component of instantaneous power, but The coupling between harmonics is not considered in the derivation process, and the harmonic power of nonlinear loads cannot be truly and effectively determined

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