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Distributed frequency control method and device for power system

A power system and frequency control technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve problems such as power system instability, limit the feasibility of existing research, and achieve the effect of satisfying operation constraints and simple control

Active Publication Date: 2018-07-03
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

This will result in a mathematically feasible solution, but it cannot be realized in the actual power system, and even cause the power system to be unstable, which greatly limits the feasibility of the existing research in the actual power system.

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  • Distributed frequency control method and device for power system
  • Distributed frequency control method and device for power system
  • Distributed frequency control method and device for power system

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] like figure 1 As shown, an embodiment of the present invention provides a distributed frequency control method for a power system, including:

[0019] S1, based on the power generation capacity of the controllable power sources in each grid area of ​​the power system, the controllable load capacity, and the virtual phase angle difference between each grid area and other grid areas in the power system except each grid area , and the operating constraints of the power system, determine the control commands of the controllable power sources in each grid area, and the control commands of the controllable loads in each grid area; the operating constraints include the po...

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Abstract

The invention provides a distributed frequency control method and device for a power system. The method comprises steps of: S1, based on the power generation amount of the controllable power source ineach power grid region of the power system, the controllable load capacity, the virtual phase angle difference between the lines between each power grid region and other power grid regions outside each power grid region, and the operating constraints of the power system, determining the control command for the controllable power source in each power grid region, and the control command of the controllable load in each power grid region, wherein the operating constraints include the power generation amount constraint of the controllable power source and the constraint of the controllable loadcapacity; and S2, according to the control command of the controllable power source in each power grid region and the control command of the controllable load in each power grid region, controlling the frequency of the power system to the rated frequency. The control method is simple, meets operational constraints, and can adapt to distributed frequency control after large-scale renewable energy access.

Description

technical field [0001] The present invention relates to the field of power system control, and more specifically, to a distributed frequency control method and device for a power system. Background technique [0002] With the access of a large number of distributed power sources such as photovoltaic power generation and wind power generation, the traditional power system is becoming larger and more complex in terms of scale, structure and movement mode. How to realize the stable and optimal operation of complex power systems has become a severe challenge. [0003] At present, each area in the power system maintains the system frequency at a rated value by adjusting the controllable resources in the area. However, after large-scale photovoltaic power generation, wind power generation and other distributed power sources are connected to the system, due to the rapid changes in their output, it is easy to cause large and rapid fluctuations in the system frequency. At this time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/38
CPCH02J3/382H02J3/46
Inventor 梅生伟王召健刘锋陈来军黄少伟
Owner TSINGHUA UNIV
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