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Multi-stage inverter equipment for grid-connected compensation of power distribution network

A distribution network and inverter technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, electrical components, etc., can solve problems such as complex characteristics, regional and power consumption property deviations, and inability to meet the increasing load

Pending Publication Date: 2020-07-07
LIVESINE ELECTRIC SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current application load characteristics of the power distribution network are complex. According to the industry, region and nature of power consumption, there are large deviations. Therefore, when the total demand for compensation is the same, the peak demand is very different, and the difference can be 2 to 4 times. As much as the compensation equipment of different specifications cannot meet the increasing demand of the load

Method used

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  • Multi-stage inverter equipment for grid-connected compensation of power distribution network
  • Multi-stage inverter equipment for grid-connected compensation of power distribution network
  • Multi-stage inverter equipment for grid-connected compensation of power distribution network

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0023] A multi-level inverter device for grid-connected compensation of distribution network, such as figure 1 As shown, it includes a plurality of sequentially cascaded inverters, and a plurality of switching devices used to control the input and output of each inverter respectively. The number of switching devices is consistent with the number of inverters, and each switching device is respectively Connect with the corresponding inverter.

[0024] Multiple sets of inverter packages can be combined into cascaded inverter mode by using a multiplexer. Its function is to provide approp...

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Abstract

The invention relates to multi-stage inverter equipment for grid-connected compensation of a power distribution network, which comprises a plurality of inverters which are cascaded in sequence and a plurality of switching devices which are respectively used for controlling the input and output of each inverter, wherein the number of the switching devices is consistent with that of the inverters, and each switching device is respectively connected with the corresponding inverter. Compared with the prior art, multiple groups of inverter packets can be combined into a cascaded inverter mode by using the multi-path switcher, and the cascaded inverter mode has the function of giving appropriate compensation capability when a power distribution network needs higher peak compensation, and can beused for a compensation field with a severe harmonic loop.

Description

technical field [0001] The invention relates to the field of electric power filtering, in particular to a multi-level inverter device for grid-connected compensation of distribution network. Background technique [0002] Harmonics and reactive power often occur in the grid connection of the distribution network, so an inverter with compensation function is required, and the compensation capability and compensation characteristics of the traditional power electronic grid connection compensation topology cannot be changed after the design is completed. To obtain a higher compensation capability, it is necessary to redesign a new topology, or replace switching elements, output inductors, etc. [0003] For example, Chinese patent CN109038652A discloses a harmonic selective compensation method for multifunctional grid-connected inverters based on modulated sliding Fourier transform, including: S1, sampling and intercepting voltage and current signals from the power grid by means ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/18H02J3/01
CPCH02J3/01H02J3/1842H02J3/38Y02E40/20Y02E40/30Y02E40/40
Inventor 舒观澜戴维
Owner LIVESINE ELECTRIC SHANGHAI CO LTD
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