Coordinated control and parameter optimization method of multi-circuit DC frequency-limited controllers

A technology of frequency limitation and coordinated control, applied in a single AC network with different frequencies, etc., to achieve the effect of flexible input mode, strong adaptive ability and effective control mode

Active Publication Date: 2017-05-10
云南电网有限责任公司电网规划研究中心
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Problems solved by technology

[0005] However, the above research is mainly limited to the application of FLC in the single-circuit DC island operation mode, and the research on the coordinated control method between the DC FLCs in the multi-circuit DC transmission system composed of multi-circuit DC network operation has not yet been involved.

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  • Coordinated control and parameter optimization method of multi-circuit DC frequency-limited controllers
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  • Coordinated control and parameter optimization method of multi-circuit DC frequency-limited controllers

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[0038] In order to describe the present invention more specifically, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The power system studied in this implementation mode is China's Yunnan Power Grid (asynchronous networking operation mode in 2016), and the purpose of the research is to improve the frequency stability of the sending end system under the asynchronous networking mode of Yunnan Power Grid under DC blocking fault. like figure 1 As shown, for the above-mentioned power system, the work flow of the coordinated control method of the multi-circuit DC frequency limiting controller is as follows:

[0040] (1) For the multi-DC sending end system of Yunnan Power Grid (a total of 6 DC circuits), calculate the bipolar blocking fault of each DC circuit separately, and determine the corresponding leading unit after the blocking fault of each DC system and the other non-faulty DC frequency l...

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Abstract

The invention discloses a coordination control and parameter optimization method for a multi-loop DC frequency limit controller. The coordination control and parameter optimization method adopts an online self-adaptive method, balances power fluctuations under a DC blocking fault of a multi-direct-current sending-end system through coordination and cooperation of a frequency limit controller of a multi-loop DC power transmission system, and improves stability of system frequency. The coordination control method for the multi-loop DC frequency limit controller can be applied to a power system dispatching control center. Compared with the prior art, the coordination control and parameter optimization method for the multi-loop DC frequency limit controller can exert the promotion effect of the multi-loop DC frequency limit controller on frequency stability during the system failure more effectively, has higher self-adaptive capability for power system operation methods, and has more effective and flexible control method.

Description

technical field [0001] The invention belongs to the technical field of power system stability control, and in particular relates to a coordinated control and parameter optimization method of a multi-circuit direct current frequency limiting controller. Background technique [0002] The HVDC transmission system has the advantages of large capacity and long-distance power transmission, and can realize the optimal allocation of resources in a wide range. It is an important means to solve high-voltage, large-capacity, long-distance power transmission and grid interconnection in the world. It plays an important role in the transmission and national networking project. Yunnan Power Grid is the main energy transmission base of China Southern Power Grid. With the continuous expansion of power transmission scale, by 2016, after the Luxi DC back-to-back project and the ±500kV Yongren-Funing DC project are completed and put into operation, Yunnan Power Grid will pass 6 The back-to-bac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/02
Inventor 钱迎春王兴刚徐政吕清洁李玲芳司大军肖友强游广增陈义宣陈姝敏
Owner 云南电网有限责任公司电网规划研究中心
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