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Method and system for controlling centralized frequency correction based on fast adjustment of multi-source flexible power

A technology of correction control and power control targets, which is applied in the direction of power transmission AC network, AC network load balancing, AC network circuit, etc., can solve the problem that the frequency centralized correction control strategy is fixed and cannot be changed with the operation mode of the power grid, and achieves the improvement of self-adaptation Sexuality, improvement of control level, and effect of reducing policy risk

Active Publication Date: 2021-04-02
NARI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a frequency centralized correction control method and system based on multi-source flexible power fast adjustment, which solves the problem of fixed frequency centralized correction control strategy Problems that cannot change with the operation mode of the grid

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  • Method and system for controlling centralized frequency correction based on fast adjustment of multi-source flexible power

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Embodiment 1

[0049] A frequency centralized correction control system based on multi-source flexible power fast adjustment, including: at least one frequency centralized correction control master station, multiple new energy centralized control terminals, energy storage control stations, hydropower centralized control stations and DC control stations;

[0050] The frequency centralized correction control master station is used for:

[0051] (1) Monitoring grid frequency offset information;

[0052] (2) Receive the type of control object and its controllable status information sent by the new energy centralized control terminal, energy storage control station, hydropower centralized control station and DC control station;

[0053] The types of control objects include: wind power, photovoltaic power generation, energy storage, hydropower and direct current;

[0054] Controllable status information includes: whether it is controllable, the maximum amount of power that can be increased and ...

Embodiment 2

[0062] Such as figure 1 As shown, a frequency centralized correction control method based on multi-source flexible power fast adjustment, including steps:

[0063] Step 1. The power grid frequency centralized correction control master station obtains the power controllable and adjustable information of the new energy centralized control terminal, energy storage control station, hydropower centralized control station and DC control station. The controllable and adjustable information includes Control object type and its controllable state information;

[0064] Controllable status information includes: whether it is controllable and the maximum amount of power that can be increased and reduced power information.

[0065] The types of control objects include: wind power, photovoltaic power generation, energy storage, hydropower and direct current.

[0066] Step 2. Based on the electromechanical simulation data of the current power grid operation mode, periodically refresh a...

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Abstract

The invention discloses a method and system for controlling centralized frequency correction based on fast adjustment of multi-source flexible power. The method comprises the following steps: acquiring control object types and controllable state information thereof under each control station; periodically refreshing and calculating frequency action values, control objects and power control targetvalues of all levels of basic rounds on the basis of electromechanical simulation data of a current power grid operation mode and the controllable and adjustable information to obtain a frequency action binary table of the basic rounds; and when power grid frequency is in the frequency action binary table of the basic rounds, sending a power control target value to a corresponding control object.According to the invention, the fast adjustment of the multi-source flexible power is adopted to replace frequency control methods such as rigid generator tripping and load shedding, so maximum reservation of a power grid structure and frequency supporting capacity after a fault is facilitated, a third defense line action strategy is refreshed in real time according to a power grid operation mode,and the adaptability of the third defense line control of a high-duty-ratio new-energy large-direct-current sending-end power grid to the system operation mode is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a frequency centralized correction control method and system based on multi-source flexible power fast adjustment. Background technique [0002] At present, affected by the reverse distribution characteristics of energy resources in the west of my country and the load demand in the central and eastern regions and the implementation of the power energy transformation strategy, the UHV DC transmission scale of the power grids in the Northwest, Northeast, North China, and Southwest regions is getting larger and larger, and the new energy in the grid, The proportion of clean energy such as hydropower is increasing, the self-healing and anti-disturbance capabilities of the power grid are gradually decreasing, the evolution of stability characteristics in the grid is complex, and the frequency stability risks caused by simulta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/28H02J3/48
CPCH02J3/36H02J3/28H02J3/48H02J2203/20H02J2300/24H02J2300/28Y02E60/60Y02E10/56
Inventor 常海军刘福锁李威霍超陈春萌王超柯贤波张钢张舒捷孙仲卿牛拴保赖业宁黄慧李兆伟黄畅想孙震宇朱玲赵学茂王玉吕亚洲郜建良薛峰袁虎玲赵彦丽张倩
Owner NARI TECH CO LTD