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A Control Method for Network Deviation Response Index of Flexible DC Distribution Network

A technology of DC distribution network and control method, which is applied in the direction of DC network circuit device, power transmission AC network, circuit device, etc., can solve the problem that the DC distribution network dispatching control strategy has not yet formed a perfect standard system.

Active Publication Date: 2020-11-06
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research on DC distribution network at home and abroad is still in its infancy, and a perfect standard system has not yet been formed for the dispatching and control strategy of DC distribution network.

Method used

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  • A Control Method for Network Deviation Response Index of Flexible DC Distribution Network
  • A Control Method for Network Deviation Response Index of Flexible DC Distribution Network
  • A Control Method for Network Deviation Response Index of Flexible DC Distribution Network

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Experimental program
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Embodiment 1

[0044] Taking the operating data of an eight-terminal flexible DC distribution network system as an example, according to the above formulas, the first network voltage, the second network voltage and the network voltage deviation response of the DC distribution network within one day can be obtained, as shown in Figure 3(a) ~ 3(c) As shown, Figure 3(a) is the all-day voltage deviation response curve of the eight-terminal flexible DC distribution network GV1; Figure 3(b) is the all-day voltage deviation response curve of the eight-terminal flexible DC distribution network GV2; Figure 3( c) is the all-day voltage deviation response curve of the eight-terminal flexible DC distribution network GVE. Determined by droop control characteristics Figure 5(a)~5(h) , Figure 5(a)~5(h) is the actual generation and load curves of nodes 1 to 8 of the eight-terminal flexible DC distribution network throughout the day, and Figure 4 (a) ~ 4 (h) The ideal generation and load curves of node...

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Abstract

The invention discloses a control method for network deviation response index for a flexible DC power distribution network. The method is characterized in that, by calculating the difference value between a first network voltage and a second network voltage, deviation between actual source load power status and ideal source load power balance state is described, and thus deviation between actual power distribution network state and ideal distribution network state is described more comprehensively. For the problem that a scheduling control strategy for the DC distribution network has no perfect standard system at present, the invention provides the network deviation response index for the flexible DC power distribution network, thereby providing effective quantitative basis for normal and stable operation of the flexible DC power distribution network.

Description

technical field [0001] The present invention relates to the technical field of direct current distribution network, in particular, to a control method for a network deviation response index of a flexible direct current distribution network. Background technique [0002] In an AC system, the frequency is an index that reflects whether the energy between the power generation and the load within the system is in balance. In the AC system, the change of load will cause a frequency deviation, which will be partially weakened by the descending characteristic of the generator set governor, that is, primary frequency regulation. In order for the AC system to return to the normal state, it is necessary to completely eliminate the remaining frequency deviation that has been partially weakened by the primary frequency modulation, that is, the secondary frequency modulation. Automatic generation control (AGC) is the main means of secondary frequency regulation, which restores the frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02J1/00
CPCH02J5/00Y02E60/60
Inventor 解大喻松涛赵祖熠李岩李巍巍
Owner SHANGHAI JIAOTONG UNIV