A Coordinated Frequency Control Method for Island Microgrids Considering Economic Characteristics

A collaborative control and characteristic technology, applied in the direction of AC networks with the same frequency from different sources, can solve the problems of potential safety hazards, easy introduction of errors in frequency signals, and no control of the system

Active Publication Date: 2018-06-05
HOHAI UNIV
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Problems solved by technology

However, the frequency is affected by the inertia of the system and there is a certain hysteresis. If the frequency feedback cannot be adaptively adjusted, it often needs to go through multiple oscillations to converge; and the measurement of the frequency signal is easy to introduce errors, and the strategy of this document is in the system. When the frequency is abnormal, cut off the frequency feedback signals of all units urgently. This will cause the system to develop in an uncontrolled state, and there are potential safety hazards

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  • A Coordinated Frequency Control Method for Island Microgrids Considering Economic Characteristics
  • A Coordinated Frequency Control Method for Island Microgrids Considering Economic Characteristics
  • A Coordinated Frequency Control Method for Island Microgrids Considering Economic Characteristics

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Embodiment Construction

[0083] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0084] The object implemented by the present invention is an isolated island microgrid with collaborative computing capabilities, such as figure 1 As shown, the entire control system is composed of communication network, physical micro-grid and mutually equal and independent units. Each unit contains three parts: communicator, decision maker and physical equipment. The topological structures of the communication network and the physical grid are independent, and they are combined by decision makers. The physical equipment includes two modules of power generation and power consumption. The power generation module is various types of power sources, including diesel generators, renewable generatio...

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Abstract

The invention discloses an island microgrid frequency cooperative control method considering economic characteristics. The island microgrid frequency cooperative control method comprises the steps of initializing parameters, correcting weight of adjacent units, planning a controllable load response instruction, adaptively adjusting a frequency feedback coefficient, calculating an active output instruction and updating a global perception item. According to the control method, a central control unit is not required; and instead, the rapid recovery of the system frequency of the island microgrid is realized in an economic optimality way by fully depending the cooperative calculation of each unit, while the active participation of the controllable loads, the adaptive regulation of control power and elimination of measuring error are taken into consideration.

Description

technical field [0001] The invention relates to an isolated island microgrid frequency cooperative control method considering economic characteristics, and belongs to the technical field of isolated island microgrid frequency control. Background technique [0002] The island microgrid is an autonomous system capable of self-control, protection and management. At this stage, the central controller mainly controls the operation of each microsource through a dedicated communication network. With the advent of the era of "Internet +" and "Energy Internet", on the one hand, the communication network requires more openness and flexibility; on the other hand, the microgrid itself not only needs to accommodate more distributed energy sources for "plug and play" In addition, the controllable load is allowed to actively participate in the optimized operation; at the same time, economic operation is always the focus of users. The above problems are particularly evident in the frequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/08
CPCH02J3/08
Inventor 赵晋泉吕朋蓬
Owner HOHAI UNIV
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