Power transmission line power flow decentralized coordination control method and system based on energy storage
A technology of power flow control and energy storage, applied in information technology support systems, AC networks with the same frequency from different sources, load balancing of AC networks, etc., to achieve the effect of reducing construction investment and improving utilization
Pending Publication Date: 2022-08-09
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
[0005] The present invention proposes a decentralized and coordinated control method and system for power flow of transmission lines based on energy storage to solve the problem of how to realize multi-point coordinated control of power flow of transmission lines based on large-scale energy storage
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[0077] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for this thorough and complete disclosure invention, and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the drawings, the same elements / elements are given the same reference numerals.
[0078] Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.
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The invention discloses a power transmission line power flow decentralized coordination control method and system based on energy storage, and the method comprises the steps: determining an out-of-limit branch set and a safety constraint branch set in a power transmission network, and calculating the minimum power flow adjustment demand of each branch in the out-of-limit branch set; determining an energy storage node set, and determining the power flow control sensitivity of each energy storage node to each branch in the out-of-limit branch set and the security constraint branch set; calculating the comprehensive control sensitivity of each energy storage node to the power flow of each branch in the out-of-limit branch set and the security constraint branch set according to the power flow control sensitivity; obtaining adjustable power of each energy storage node, performing type division on the energy storage nodes according to the adjustable power and the comprehensive control sensitivity, and determining a discharging node set and a charging node set; and carrying out charging and discharging adjustment according to the minimum power flow adjustment demand quantity, the discharging node set and the charging node set so as to control the power of all branches in the power transmission network not to be out of limit.
Description
technical field [0001] The invention relates to the technical field of application of large-scale energy storage in power system security and stability control, and more particularly, to a method and system for power flow dispersion coordination control of power transmission lines based on energy storage. Background technique [0002] With the access of large-scale new energy and large-capacity DC, the transmission channel of new energy-rich areas is blocked for a short time, and the power grid at the receiving end of the large-capacity DC feed is short-circuited by power flow caused by power flow transfer after AC and DC faults. The problem of time overload has become an important factor restricting the development of new energy and limiting the capacity of AC and DC power transmission. [0003] The measures currently taken in planning and operation usually include the construction of new power transmission and transformation equipment, limiting the maximum access capacity ...
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IPC IPC(8): H02J3/06H02J3/32
CPCH02J3/06H02J3/32H02J2203/10Y04S10/50
Inventor 吴俊玲李美妍代倩张健秦晓辉周年光陆润钊蒋星禹海峰覃琴赵珊珊贺海磊杨京齐
Owner CHINA ELECTRIC POWER RES INST