Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and controller for online active control of fluctuating energy HVDC transmission

A control method and transmission fluctuation technology, applied in the direction of power transmission AC network, etc., can solve the problem that the wind power consumption capacity of the power grid is not fully utilized, and achieve the effect of increasing operational flexibility

Active Publication Date: 2015-07-22
HITACHI ENERGY SWITZERLAND AG
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, at the receiving end of HVDC, the wind power absorption capacity of the grid has not been fully utilized

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and controller for online active control of fluctuating energy HVDC transmission
  • Method and controller for online active control of fluctuating energy HVDC transmission
  • Method and controller for online active control of fluctuating energy HVDC transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the present invention are illustrated.

[0023] figure 1 It shows a flowchart of an online active power control method for HVDC transmission fluctuating energy provided by an embodiment of the present invention.

[0024] Such as figure 1 As shown, the online active power control method 100 for HVDC transmission fluctuating energy includes:

[0025] Step 102: Obtain the total power generation P of the HVDC transmission terminal required by the controller in real time source Or the system frequency f, and / or the transmission power P of other power transmission channels associated with it; wherein, the other power transmission channels include AC and / or DC channels. For example, according to the present invention image 3 In the embodiment shown, it measures the voltage V at the common connection point between the HVDC converter station and the...

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

PUM

No PUM Login to View More

Abstract

The invention discloses a method and controller for online active control of fluctuating energy HVDC transmission. The method comprises the steps of acquiring the total electricity generation quantity or system frequency f of a transmission end of the HVDC needed by the controller and / or the transmission power P of other power transmission channels correlated to the HVDC in real time, wherein other power transmission channels include an alternating current and / or direct current channel; controlling a power transmission target of the HVDC to be equal to a transmission instruction from a dispatching center or a safety and stability control device of an electric system under the condition of an abnormal operation state; controlling the power transmission target to be equal to P0 from the dispatching center; controlling the HVDC online to enable the power transmission target Pdc_ref to fluctuate along with a fluctuation power supply according to Psource or f; or controlling Pdc_ref according to P to enable P to be kept within a preset range. According to the method and controller for online active control of fluctuating energy HVDC transmission, operation flexibility of a whole transmission system is improved, and long-distance transmission of fluctuating energy by means of a point-to-point or multi-terminal thyristor based converter HVDC transmission system is achieved.

Description

Technical field [0001] The invention relates to a control method of a high voltage direct current (HVDC) system. In particular, the present invention relates to an online active power control method and its controller for HVDC transmission fluctuating energy. Background technique [0002] With the development and maturity of power generation technology, in recent years, wind energy is becoming one of the widely used renewable resources in the field of power generation. Limited by geographical conditions and wind resources, places with the richest wind energy resources are usually far away from those load centers, such as onshore wind resources in China and the United States, and offshore wind resources in Europe. Grid integration and transmission of wind power have become a bottleneck restricting the further development of wind power. As one of the most effective solutions for long-distance transmission of high-power electric power, thyristor based converter high voltage DC tra...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 岳程燕谢海莲蔡蓉
Owner HITACHI ENERGY SWITZERLAND AG