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Three-in-one power electronic compensation transformer substation

A technology of power electronics and substations, applied in the direction of AC network voltage adjustment, multi-phase network elimination/reduction of asymmetry, multi-phase network asymmetry reduction, etc., can solve problems such as compensation failure, line loss, current increase, etc., to achieve The effect of highlighting substantive features

Pending Publication Date: 2020-10-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some existing active compensation equipment requires the grid to provide additional compensation current by taking power from the grid as its energy source, and this current flowing through the transmission line will cause a large amount of additional line loss, and when the load When it exceeds a certain range, the current consumed by the compensation will also increase, which will cause the compensation to fail

Method used

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  • Three-in-one power electronic compensation transformer substation
  • Three-in-one power electronic compensation transformer substation
  • Three-in-one power electronic compensation transformer substation

Examples

Experimental program
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Embodiment 1

[0047] see Figure 1 to Figure 5 , a three-in-one power electronic compensation substation, including three-phase phase lines and neutral lines; a voltage compensation module 1 is connected in series and parallel to the three-phase phase lines, and a voltage compensation module 1 is connected in parallel between the three-phase phase lines and the neutral line The power quality compensation module 2 and an energy storage power supply module 3 are electrically connected to a power electronic compensation substation energy management module 4 via a sensor detection module 5 at the output end of the three-phase phase line. The power electronic compensation substation energy management module 4 is electrically A voltage compensation module 1, power quality compensation module 2 and energy storage power supply module 3 are connected, and the voltage compensation module 1, power quality compensation module 2 and energy storage power supply module 3 are electrically connected to each ...

Embodiment 2

[0049] Such as figure 1 As shown, a three-in-one power electronic compensation substation includes three-phase phase line, neutral line, voltage compensation module 1, power quality compensation module 2, energy storage power supply module 3, power electronic compensation substation energy management module 4, transmission Sensing detection unit 5 and common DC bus 6, wherein,

[0050] The input terminal of the voltage compensation module 1 is connected to the input terminal of the three-phase phase line and the input terminal of the neutral line, and the output terminal is connected to the output terminal of the three-phase phase line, which is used to compensate the voltage drop of the transmission line and improve the voltage quality so that the voltage at the end of the line conforms to the grid power supply standard;

[0051] The power quality compensation module 2 is connected in parallel in the transmission line, that is, in parallel between the three-phase phase line ...

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Abstract

The invention discloses a three-in-one power electronic compensation transformer substation, which is connected in series in a power supply line and comprises a voltage compensation module, an electric energy quality compensation module, an energy storage power supply module, a power electronic compensation transformer substation energy management module, a sensing detection module and a common direct-current bus. According to the three-in-one power electronic compensation transformer substation, three key devices for power grid adjustment are integrated and configured, and unified energy management is carried out; day and night peak and valley load adjustment is achieved through the energy storage technology, energy stored in the power utilization valley period can serve as an energy source to be supplied to the voltage compensation system and the electric energy quality compensation system, and the problem that compensation fails due to the fact that extra line current needs to be increased when electricity is taken from a power grid in the peak period is effectively solved. The three-in-one power electronic compensation transformer substation is arranged at a voltage drop placein a long-distance power transmission line in a distributed manner, the electric energy transmission quality of the whole line can be effectively improved, and the comprehensive adjustment of a powergrid is realized.

Description

technical field [0001] The invention belongs to a circuit device or system for power supply or distribution, in particular to a three-in-one power electronic compensation substation for an AC transmission line or an AC power distribution network. Background technique [0002] In the process of smart grid construction, power transmission and transformation technology is a key technology, which can provide the necessary guarantee for the safe and stable operation of the smart grid, and can effectively improve the operating efficiency of the smart grid and increase social benefits. Poor economic benefits and low input-output ratio of power grid construction in areas with scattered loads are common problems faced by power grid companies all over the world. How to provide suitable power supply services for the population in areas with scattered loads in a more economical way has become a worldwide hot topic . Due to the large power supply radius, it is easy to have low power sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J3/28H02J3/26
CPCH02J3/12H02J3/28H02J3/26Y02E40/50Y02E40/30Y02E40/40
Inventor 徐国卿武慧莉
Owner SHANGHAI UNIV