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Control method and control system based on distributed small hydropower station combined energy storage

A technology that combines energy storage and control methods, applied in energy storage, electrical components, circuit devices, etc., can solve problems such as high operating costs and poor regulation ability of power flow control technology

Active Publication Date: 2021-06-29
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a control method and control system based on distributed small hydropower combined energy storage to solve the problems of poor control ability and high operating cost of existing distributed small hydropower access to distribution network power flow control technology

Method used

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  • Control method and control system based on distributed small hydropower station combined energy storage
  • Control method and control system based on distributed small hydropower station combined energy storage
  • Control method and control system based on distributed small hydropower station combined energy storage

Examples

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Embodiment

[0116] 1) Construct the steady-state power generation model P of the target small hydropower station Sw4∈{0.5MW,0.6MW,0.5MW,0.4MW}, L s1 = 0.5km, L s2 = 1.5km, L s3 = 2.5km, L s4 = 3.5 km.

[0117] 2) Construct the transient power generation model P of the target small hydropower station Sz4 ∈{0.5±0.1Δt,0.6,0.5±0.1Δt,0.4±0.1Δt}, Δt≈0.5h,

[0118] 3) Build the charging and discharging energy storage model P of the external energy storage module cj ;

[0119] 4) calculating the minimum value of the total capacity of the external energy storage module;

[0120] 5) Obtain the capacity and location of each of the external energy storage modules according to the first constraint condition, wherein the first constraint condition is the charge and discharge balance of each of the external energy storage modules and the water storage and energy storage and discharge of each of the small hydropower stations energy balance;

[0121] The obtained capacity of each external energy ...

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Abstract

The invention provides a control method and a control system based on distributed small hydropower station combined energy storage. The method comprises the steps: constructing a steady-state power generation model of a target small hydropower station on a target line; constructing a transient power generation model of the target small hydropower station on the target line; constructing a charging and discharging energy storage model of an external energy storage module; calculating the minimum value of the total capacity of the external energy storage module; obtaining the capacity and position of each external energy storage module according to a first constraint condition; calculating the minimum value of the power loss power consumption on the target line; and according to a second constraint condition, obtaining the starting time and the ending time of transient power generation of each small hydropower station. By adopting the method, the plurality of small hydropower stations are adopted for water storage and energy accumulation and are combined with the external energy storage module for peak regulation, the power flow regulation and control capability of the access power distribution network is high, the operation cost and the line loss are reduced, and the economy and the stability of power grid operation are improved.

Description

technical field [0001] The present application relates to the technical field of hydropower energy storage, and in particular to a control method and control system based on distributed small hydropower joint energy storage. Background technique [0002] Against the backdrop of the national policy of energy conservation and emission reduction, and the vigorous development of clean and green energy, small hydropower has experienced a long period of disorderly development, and a large number of small hydropower have been connected to distribution networks across the country. However, small hydropower is generally built in remote mountainous areas, and the distribution network network structure connected to it is poor, which basically cannot withstand the injection of a large amount of active power and reactive power. As a run-of-river hydropower station, its poor self-regulation ability and strong seasonal characteristics often cause a series of problems such as large voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/06
CPCH02J3/28H02J3/06H02J2203/20H02J2203/10Y02E70/30
Inventor 杨金东刘红文吴万军聂鼎
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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