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Method for control over power grid time-space characteristics through coordination of alternating currents and direct currents

A technology of AC-DC coordination and control method, which is applied in the field of AC-DC coordination control of the spatiotemporal characteristics of the power grid, and can solve the problems of inability to realize the system, disturbance adaptive adjustment, etc.

Active Publication Date: 2013-10-09
STATE GRID CORP OF CHINA +4
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Problems solved by technology

However, for power modulation at present, power modulation cannot achieve the purpose of adaptive adjustment according to system disturbance, and its application has certain limitations.

Method used

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  • Method for control over power grid time-space characteristics through coordination of alternating currents and direct currents
  • Method for control over power grid time-space characteristics through coordination of alternating currents and direct currents
  • Method for control over power grid time-space characteristics through coordination of alternating currents and direct currents

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Embodiment Construction

[0053]The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] The invention provides an AC-DC coordinated control method for the time-space characteristics of the power grid, the flow chart of which is as follows Figure 4 As shown, the method is based on the collection of real-time state information, considering the time and space characteristics of the power grid, by identifying the magnitude of the system disturbance, using the particle swarm optimization algorithm to optimize the parameters of the DC modulator, adaptively adjusting the DC transmission power, and realizing multi-circuit AC-DC The coordinated control of the system improves the transient stability level.

[0055] Usually, the DC power modulation is generally realized by the following method, and the DC transmission power is expressed by the following expression:

[0056] Δ P ...

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Abstract

The invention relates to the field of electric power systems, in particular to a method for control over power grid time-space characteristics through coordination of alternating currents and direct currents. According to the method, time and space characteristics of a power grid are taken into consideration, direct current modulator parameters are optimized by means of a particle swarm algorithm according to the disturbance amplitude of a power grid monitoring data recognition system, direct current transmitting power is adjusted in an self-adaptive mode, therefore, coordination control over a multi-loop alternating and direct current system is realized, and the level of transient stability is improved. The method for control over the power grid time-space characteristics through the coordination of the alternating currents and the direct currents reasonably utilizes resources in the power grid, is an effective way of improving the safety and economic benefit of the power grid, and has great significance in guaranteeing the economic efficiency, the safety and the reliability of normal operation of the power grid.

Description

technical field [0001] The invention relates to the field of electric power systems, in particular to an AC / DC coordination control method for time-space characteristics of a power grid. Background technique [0002] The commissioning of UHV DC has brought new challenges to the safe and stable operation of the Northwest Power Grid. At the same time, because UHV DC has large capacity and fast power regulation capabilities, making full use of DC power modulation control can improve the power grid’s ability to withstand fault impacts and improve Dynamic characteristics of hybrid system after disturbance. At present, the AC-DC interconnection grid mostly uses the fast adjustment characteristics of the DC system to improve the stability of the system operation: DC power is urgently increased or dropped, frequency control with both sides of the frequency as the input signal, and reactive power modulation to improve the stability of the AC voltage , additional damping control to s...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
Inventor 周俊项丽丁茂生汪宁渤宋云亭陈得治刘翀杨琦李晓珺
Owner STATE GRID CORP OF CHINA
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