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Power angle stability improving method and system for alternating current and direct current interconnected power system

A power angle stability, power system technology, applied in AC network load balancing, electrical components, reducing/preventing power oscillations, etc. question

Pending Publication Date: 2019-12-03
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the existing technology, the large-disturbance power angle stability control method by means of machine and load shedding will inevitably cause economic losses on the generator side and the load side; flexible AC transmission technology and new DC transmission technology have improved the power transmission of the interconnected grid. limit, but lacks adaptability to complex low-frequency oscillation problems of interconnected grids
In general, the large-disturbance and small-disturbance power angle stability improvement strategies in the prior art often have problems such as too complicated models and difficult to coordinate control parameters. Therefore, a simple, highly compatible, and fast-response power angle Stability control technology is necessary to improve power angle stability

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  • Power angle stability improving method and system for alternating current and direct current interconnected power system
  • Power angle stability improving method and system for alternating current and direct current interconnected power system
  • Power angle stability improving method and system for alternating current and direct current interconnected power system

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Embodiment Construction

[0048] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050]The present invention provides a method for improving power angle stability of an AC-DC interconnected power system, such as figure 1 As shown, the method includes:

[0051] Ste...

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Abstract

The invention relates to a power angle stability improving method and system for an alternating current and direct current interconnected power system. The method comprises the steps of: collecting the power angle difference of a generator in the alternating current and direct current interconnected power system; determining a charging / discharging power reference value of the energy storage systemaccording to the power angle difference; determining the charging / discharging power of the energy storage system according to the charging / discharging power reference value; and controlling the energy storage system to perform charging / discharging based on the charging / discharging power of the energy storage system. The technical scheme provided by the invention aims at the power angle stabilitycharacteristic of the AC / DC interconnected power system, the feasibility that the energy storage technology rapidly consumes the unbalanced power of the AC-DC interconnected power system and improvesthe power angle stability of the AC-DC interconnected power system is analyzed, an energy storage controller capable of improving the power angle stability is designed, and finally the power angle stability of the AC-DC interconnected power system is improved based on the energy storage technology.

Description

technical field [0001] The invention belongs to the field of power angle stability of electric power systems, and in particular relates to a method and system for improving power angle stability of an AC-DC interconnected power system. Background technique [0002] Due to the advantages of economy and AC system fault isolation, HVDC transmission has become an important technical means for the optimization strategy of cross-regional power resources. However, compared with the traditional AC interconnected power system, the power angle stability characteristics of the AC / DC interconnected system are more complicated. Research on the power angle stability control technology for the AC / DC interconnected system has very positive significance for the operation safety and power supply reliability of the interconnected grid. . [0003] According to the difference of disturbance size and corresponding analysis method, the power angle stability of power system can be divided into lar...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/24H02J5/00
CPCH02J3/32H02J3/24H02J5/00
Inventor 崔红芬杨波叶季蕾余豪杰王德顺周晨薛金花冯鑫振
Owner CHINA ELECTRIC POWER RES INST
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