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A Coordinated Voltage Control Method for Active Distribution Network Based on Emergency Demand Response

A technology of active distribution network and demand response, applied in the direction of AC network voltage adjustment, reactive power compensation, etc., to achieve the effect of convenient settlement and high reliability

Active Publication Date: 2019-08-20
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of sensitivity method, previous studies mainly focused on the sensitivity analysis of reactive power to voltage, while the sensitivity of active power flow to voltage was rarely mentioned.

Method used

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  • A Coordinated Voltage Control Method for Active Distribution Network Based on Emergency Demand Response
  • A Coordinated Voltage Control Method for Active Distribution Network Based on Emergency Demand Response
  • A Coordinated Voltage Control Method for Active Distribution Network Based on Emergency Demand Response

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Embodiment Construction

[0117] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0118] like figure 1 , an active distribution network voltage coordination control method based on emergency demand response, including the following steps:

[0119] S1.DG participates in EDR

[0120] DR is generally used as a resource to assist in the consumption of DG and is used for planning and layout of DG. In practice, DG is often forced to limit grid-connected capacity in certain periods of time due to grid security considerations. The invention allows the DG to participate in the EDR project, that is, allows the DG's power generation capacity to participate in the EDR project, and when the security of the power grid is threatened, the specified power generation capacity can be quickly lowered. Compared with traditional EDR projects, DG's participation in EDR has...

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Abstract

An emergency demand response-based active power distribution network voltage coordination control method disclosed by the present invention is characterized in that an emergency demand response program is used to cooperate with a conventional voltage regulation device to coordinate and control the voltage of an active power distribution network; when the voltage of the active power distribution network exceeds a limit, the conventional voltage regulation device, such as a transformer with traps, a switched capacitor, etc., is used to regulate the voltage; when a conventional mode loses efficacy, the emergency demand response is scheduled to regulate the voltage, and the concrete operations are that: by taking a sensitivity matrix of the active and reactive power of nodes to the voltages as the reference, a key voltage node is defined, the voltage of the node is used as a control target, and the emergency demand response amounts of the nodes are determined and optimized. According to the present invention, the derivation of the sensitivity matrix of the active and reactive power of nodes to the voltages under a polar coordinate system is contained, a strategy of enabling the distributed power supply capacity to participate in the emergency demand response to increase the voltage regulation capacity is provided, and finally, the effectiveness and the superiority of the method are analyzed and verified by the concrete implement of the cases.

Description

technical field [0001] The invention relates to the field of power system control operation, in particular to an active distribution network voltage coordination control method based on emergency demand response. Background technique [0002] In recent years, under the impetus of national policy and technological development, DG (distributed power generation, DistributionGeneration), large-scale energy storage equipment and electric vehicles have been connected to the grid on a large scale, and the distribution network has gradually changed from the traditional passive distribution network to the active one. Distribution network (Active Distribution Network, AND) changes; at the same time, problems such as voltage over-limit and bidirectional power flow in ADN are becoming increasingly prominent. On the one hand, DG changes the distribution of voltage, on the other hand, its power fluctuation also brings certain difficulties to the voltage regulation of distribution network....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 梁华彬杜兆斌赵芳李含玉张文倩刘源俊周保荣洪潮
Owner SOUTH CHINA UNIV OF TECH
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