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Direct current power distribution system stabilizing system

A technology for system stability and DC power distribution, applied in DC network circuit devices, DC circuits can reduce harmonics/ripples, electrical components, etc. Unstable power supply system and other problems, to achieve the effect of flexible impedance characteristics

Pending Publication Date: 2020-03-10
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, similar to the AC power distribution system, when there is a mismatch between the equivalent impedance of the power supply, the equivalent impedance of the load, and the equivalent impedance of the transmission line in the DC power supply system, the power supply system may become unstable and seriously affect the working characteristics of the system.
The existing stability criterion based on impedance can judge whether the DC power distribution system is stable or not, but it cannot directly guide the real-time online adjustment of the impedance stabilizer

Method used

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Embodiment 1

[0031] Please refer to Figure 1~2 , the embodiment of the present invention provides a DC power distribution system stabilization system, including a harmonic current injection device 1, a voltage and current measurement module 2, an impedance calculation module 3, a drawing module 4, a deep reinforcement learning decision module 5, and a stability enhancer 6;

[0032] The harmonic current injection device 1 is connected to the DC bus, and is used to inject harmonic current into the DC bus in the form of frequency sweep;

[0033] The voltage and current measurement module 2 is connected to the DC bus, and is used to measure the harmonic current generated by the harmonic current injection device 1 and the harmonic voltage at the power supply port and the port harmonic at the load side caused by the harmonic current. wave voltage;

[0034] The impedance calculation module 3 is connected to the voltage and current measurement module 2, and is used to measure the harmonic curren...

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Abstract

The invention discloses a direct current power distribution system stabilizing system. The system comprises a harmonic current injection device, a voltage and current measurement module, an impedancecalculation module, a drawing module, a deep reinforcement learning decision-making module and a stability enhancer. The harmonic current injection device is connected with a direct current bus. The voltage and current measurement module is connected with the direct current bus. The impedance calculation module is connected with the voltage and current measurement module. The drawing module is connected with the impedance calculation module. The deep reinforcement learning decision-making module is connected with the drawing module. And the stability enhancer is connected with the deep reinforcement learning decision-making module and the direct current bus. By using the direct current power distribution system stabilizing system of the embodiment of the invention, an impedance characteristic of the system can be flexibly regulated and controlled, and stable operation of the system is realized.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a DC power distribution system stabilization system. Background technique [0002] DC power distribution technology refers to the power transmission technology that adopts DC system as the leading factor in the distribution network. Compared with AC power distribution technology, DC power distribution technology has many potential advantages. However, similar to the AC power distribution system, when there is a mismatch between the equivalent impedance of the power supply, the equivalent impedance of the load, and the equivalent impedance of the transmission line in the DC power supply system, the power supply system may become unstable and seriously affect the working characteristics of the system. . The existing impedance-based stability criterion can judge whether the DC power distribution system is stable or not, but it cannot directly guide the real-time online adjust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J1/02
CPCH02J1/00H02J1/02
Inventor 卫才猛郭琳彭翠萍
Owner GUANGDONG POWER GRID CO LTD