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New energy field station frequency control method and device considering power loss

A technology of frequency control and power loss, applied in circuit devices, reducing/preventing power oscillation, AC network circuits, etc., can solve the problems of low frequency control accuracy and consistency, response time, integral power ratio and stability of new energy stations The problems such as state control deviation and frequency modulation index do not meet, to achieve the effect of optimizing frequency modulation response time, good adaptability, and improving accuracy and consistency

Pending Publication Date: 2021-02-02
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, frequency modulation indicators such as response time, integral power ratio, and steady-state control deviation do not meet relevant technical requirements, and the accuracy and consistency of frequency control in new energy stations are low.

Method used

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  • New energy field station frequency control method and device considering power loss
  • New energy field station frequency control method and device considering power loss
  • New energy field station frequency control method and device considering power loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 of the present invention provides a new energy station frequency control method considering power loss, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:

[0059] S101: Based on the rated active power of the new energy station, determine the active power loss value of the new energy station and the actual active power command value that should be issued by the new energy station at the current moment;

[0060] S102: Based on the active power loss value of the new energy station and the actual active power command value that should be issued by the new energy station at the current moment, determine the actual active power adjustment amount that should be issued by the new energy station;

[0061] S103: Determine the frequency deviation of the grid-connected point of the new energy site based on the actual active power adjustment amount to be issued by the new energy site, and perform frequency control on the new en...

Embodiment 2

[0109] Based on the same inventive concept, Embodiment 2 of the present invention provides a new energy station frequency control device that takes power loss into account, including:

[0110] The first determination module is used to determine the active power loss value of the new energy station and the actual active power command value that should be issued by the new energy station at the current moment based on the rated active power of the new energy station;

[0111] The second determination module is used to determine the actual active power adjustment amount that should be issued by the new energy station based on the active power loss value of the new energy station and the active power command value that should be issued by the new energy station at the current moment;

[0112] The control module is used to determine the frequency deviation of the grid-connected point of the new energy site based on the actual active power adjustment amount to be delivered by the new...

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Abstract

The invention provides a new energy field station frequency control method and device considering power loss. The method comprises the following steps of determining an active power loss value of a new energy field station and an active power instruction value actually issued by the new energy field station at the current moment, determining an active power regulation quantity which should be actually issued by the new energy field station, determining the frequency deviation of the grid-connected point of the new energy field station, and controlling the frequency of the new energy field station, so that the accuracy and consistency of frequency control are improved. Active power loss values of a power generation unit, a current collection circuit, a boosting transformer, a reactive powercompensation device and the like in the new energy field station in different operation states are considered, and frequency modulation response time and other technical indexes are optimized; the active power loss value of the new energy field station determined by the technical scheme provided by the invention is closer to the actual operation condition of the new energy field station, the credibility is higher, and the method can be used in the new energy field station comprising a plurality of automatic power generation control systems, and has good adaptability.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a frequency control method and device for a new energy station taking power loss into consideration. Background technique [0002] In recent years, domestic wind power / photovoltaic installed capacity has continued to grow rapidly, the penetration rate of new energy in local power grids has continued to rise, and the proportion of synchronous generators in the power grid has gradually declined. In order to ensure the safe and stable operation of power grids and new energy power stations, the national standards GB / T 19963-2011 "Technical Regulations for Connecting Wind Farms to Power Systems" and GB / T 19964-2012 "Regulations for Connecting Photovoltaic Power Stations to Power Systems" require wind power / photovoltaic Should have the ability to actively participate in frequency regulation of the power grid. In the national standard GB / T 19963 "Technical Regulations for Connecting...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/48
CPCH02J3/48H02J3/241
Inventor 樊熠秦世耀李少林张金平贺敬张梅唐建芳朱琼锋李春彦苗风麟张松涛王顺来李建立
Owner CHINA ELECTRIC POWER RES INST
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