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Active power coordination control method and system of an optical storage power station

A technology of coordinated control and centralized control system, which is applied in the direction of circuit devices, AC network circuits, reducing/preventing power oscillation, etc., and can solve problems such as power system power flow and affecting the grid's ability to accept photovoltaic power generation

Active Publication Date: 2019-01-22
STATE GRID QINGHAI ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the increasing scale of photovoltaic grid-connected power generation systems connected to the grid, it brings power system power flow, stability, peak regulation, and coordination among multiple photovoltaic power plants to grid dispatching, which affects the grid's ability to accept photovoltaic power generation.

Method used

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  • Active power coordination control method and system of an optical storage power station
  • Active power coordination control method and system of an optical storage power station
  • Active power coordination control method and system of an optical storage power station

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Embodiment 1

[0076] The active power coordination control method of the photovoltaic storage power station provided by the embodiment of the present invention, its specific implementation process is as follows figure 1 shown, including:

[0077] S101: Calculate the active power reference value of the photovoltaic storage power station according to the grid connection point frequency of the photovoltaic storage power station, the frequency change rate and the automatic power generation control command of the grid;

[0078] S102: Determine the power adjustment direction of the optical storage power station according to the grid-connected point frequency of the optical storage power station, and determine the active power coordination control mode of the optical storage power station according to the power adjustment direction of the optical storage power station;

[0079] S103: Based on the active power reference value and the active power coordinated control mode of the photovoltaic storage...

Embodiment 2

[0113] The implementation flow chart of the active power coordination control method of the photovoltaic storage power station provided in this embodiment is as follows: figure 2 As shown, it contains the following content:

[0114] Step S1: Based on the centralized control system of the photovoltaic storage power station, receive the grid AGC control command in real time;

[0115] Step S2: Real-time monitoring of the grid-connected point frequency of the solar-storage power station;

[0116] Step S3: When the frequency exceeds the adjustment dead zone (upper dead zone threshold f up , the lower dead zone threshold f dn ), calculate the adjusted amount of active power output according to the frequency, and revise the grid AGC active power control instruction, including:

[0117] Step S3-1: If f>f up , to calculate the adjusted amount of active power output:

[0118] ΔP fup = K pf ×(f-f up )+K dpf ×df (7)

[0119] Step S3-2: Calculate the corrected active power refer...

Embodiment 3

[0127] Based on the same inventive concept, the present invention also provides an active power coordination control system for photovoltaic storage power stations, such as image 3 As shown, the system includes:

[0128] The active power reference value calculation module is used to calculate the active power reference value of the optical storage power station according to the frequency of the grid connection point of the optical storage power station, the frequency change rate and the automatic power generation control command of the grid;

[0129] The active power coordination control command module is used to determine the active power coordination control mode of the photovoltaic storage power station according to the grid connection point frequency of the photovoltaic storage power station, and based on the active power reference value and the active power coordination control mode of the photovoltaic storage power station, obtain the photovoltaic unit and energy storage...

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Abstract

The invention provides an active power coordination control method and system of an optical storage power station. The method comprises the following steps: calculating the reference value of the active power of the optical storage power station according to the frequency of the optical storage power station, the frequency change rate and the active power control instruction of the automatic generation of the electric network; determining The active power coordination control mode of optical storage power station according to the frequency of the optical storage power station. Based on the active power reference value and the active power coordination control mode of the photovoltaic storage power station, obtaining the active power control commands of the photovoltaic unit and the energystorage unit, and carrying out the active power regulation of the photovoltaic storage power station according to the active power control commands of the photovoltaic unit and the energy storage unit. The technical proposal provided by the invention improves the power grid stability support strength by configuring an energy storage system, considering the use of an energy storage unit with maximum capacity, and carrying out centralized active power coordination control on the photovoltaic unit and the energy storage unit.

Description

technical field [0001] The invention relates to the technical field of coordinated control of centralized configuration of energy storage in a photovoltaic power station, and in particular to a method for coordinated control of active power in a photovoltaic power station. Background technique [0002] Photovoltaic power generation is a new energy generation technology that uses the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy. The solar cells are packaged and protected after being connected in series to form a large-area solar cell module, and then cooperate with power controllers and other components to form a photovoltaic power generation device. The photovoltaic power generation device transmits electric energy to the grid through an inverter, forming a grid-connected photovoltaic power generation system. [0003] At present, the energy storage system is mostly used in the smooth output of distributed power g...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20Y02E10/56
Inventor 张杰谭曲立楠杨立滨陈宁李春来朱凌志李正曦张磊杨军韩华玲甘嘉田葛路明
Owner STATE GRID QINGHAI ELECTRIC POWER
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