Multi-feed-in DC recovery process VDCOL control parameter optimization method

A technology of multi-feed DC and recovery process, applied in power transmission AC network and other directions, can solve problems such as lack of calculation verification
CN104167754AActive Publication Date: 2014-11-26ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
2 Cites 24 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2014-11-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a multi-feed-in DC recovery process VDCOL control parameter optimization method, comprising steps of establishing an optimized module target function, establishing PQ coupling simplified model to obtain a constraint condition of the optimized model target function, calculating all equations of the PQ coupling simplified model in order to obtain the minimum value Qmax, min of a wattles power peak value consumed by the inverter station after optimization, and determining the optimized VHj, VLj, IHj, and ILj. The invention summarizes the recovery characteristics of the voltage of the convertor station, simplifies the calculation method of active power and wattless power, establishes the PC coupling recovery simplified model, quantitively reflects the changing pattern of the active power and the wattless power after the fault, calculates and analyzes the influence of the VDCOL parameter, and reduces the wattless power requirement of the multi-circuit DC common recovery for the receiving terminal power grid.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for optimizing VDCOL control parameters in a multi-infeed DC restoration process of a high-voltage direct current transmission system, belonging to the technical field of power system control operation protection. Background technique

[0002] In the control mode of the DC transmission system, changing the control parameters of the low-voltage current limiting (VDCOL) link can control the recovery characteristics of the active power of the DC transmission system after a fault, so it plays an important role in the study of the recovery after the DC fault. In the AC-DC power transmission system with multi-infeed DC, if the electrical distance of the multi-circuit inverter stations is very close, when a serious fault occurs in the power grid near one of the inverter stations (such as a three-phase metallic ground short circuit), It may cause the commutation bus voltage of multiple inverter stations to drop significantly, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More