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Chain-type battery energy storage converter and control method suitable for medium-voltage direct current distribution network

A technology of battery energy storage and control methods, which is applied in the direction of current collectors, battery circuit devices, electric vehicles, etc., can solve the problems of not being applicable to DC distribution networks, etc., achieve easy redundant work design, improve system reliability, and reduce system costs. cost effect

Active Publication Date: 2018-11-16
XJ POWER CO LTD +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is no battery energy storage converter suitable for DC distribution networks, especially in medium-voltage DC distribution networks.

Method used

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  • Chain-type battery energy storage converter and control method suitable for medium-voltage direct current distribution network
  • Chain-type battery energy storage converter and control method suitable for medium-voltage direct current distribution network
  • Chain-type battery energy storage converter and control method suitable for medium-voltage direct current distribution network

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] Safety, economy, high quality, and reliability are the basic requirements for DC power distribution systems, and they are also the development goals of the future power grid. In order to achieve this goal, that is, to improve the reliability and power quality of the DC power distribution system, people began to focus on energy storage devices. After the energy storage device is connected to the DC distribution network, the power generation and power consumption are separated in space and time. The power generation is no longer transmitted and utilized in real time, and the power consumption and power generation are no longer balanced in real time. Its impact on the traditional distribution network The impact can be summarized as follows:

[0028] Peak shaving and valley filling: The energy storage device can store excess electric energy as a load duri...

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Abstract

The invention relates to a chained battery energy storage converter suitable for a medium-voltage DC power distribution network and a control method. The converter comprises at least two battery energy storage converter modules, wherein each battery energy storage converter module comprises an energy storage device and a DC / DC device; each energy storage device is connected to one side of the corresponding DC / DC device; other sides of the DC / DC devices in the battery energy storage converter modules are cascaded in sequence and are connected to DC buses through filter inductances. The corresponding DC / DC device is controlled according to a superposed signal of a feedforward control modulation signal, an inductive current control output modulation signal and a balancing control output modulation signal of the energy storage device, so that the control of the converter under a grid-connected mode and an off-network mode can be realized, and thus the reliable operation of the converter is guaranteed.

Description

technical field [0001] The invention relates to a chain-type battery energy storage converter suitable for a medium-voltage direct current distribution network and a control method, and belongs to the field of battery energy storage converters in a direct current distribution network. Background technique [0002] With the rapid development and wide application of new energy, new materials, information technology and power electronics technology, users' requirements for power consumption, power quality and power supply reliability continue to increase, and the existing AC distribution network will face distributed new energy. (Power supply) access, diversification of load and power demand, complexity of power flow balance coordination control, and huge challenges in terms of stability, efficiency and economy of power supply. The traditional distribution network structure and distribution and power supply methods are increasingly unable to meet the requirements of the rapidly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/34
CPCH02J7/34H02J7/345
Inventor 赵玲陈天锦曹智慧陈世峰韩海伦于锋杨振国乔海强
Owner XJ POWER CO LTD
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