US 2025/0348043 A1Published application

Float-discrete differential dynamic programming successive approximation method for cascade reservoir group scheduling

AssigneeWuhan University

InventorsXueshan AI, Longqing ZHAO, Fengshuo LIU, Yangxin YU, Xiaoke ZHANG, Yaoqun CUI, Zihang LUO, Xuanyu SHI

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Abstract

The invention provides a float-discrete differential dynamic programming successive approximation method for cascade reservoir group scheduling, comprising the following steps: water levels of cascade reservoir group are raised from small to large according to water surface areas of reservoirs; the cascade reservoir group generates electricity after raising the water level according to incoming water; at the end of calculation period, and initial water level trajectory is obtained when the raised water level of the cascade reservoir group falls back to the set water level; based on the initial water level trajectory obtained, discrete differential dynamic programming calculation of each reservoir is carried out from upstream to downstream with the goal of maximizing the cascade total power generation, and the improved water level trajectory of each cascade reservoir is obtained; taking the improved water level trajectory of each cascade reservoir as the initial trajectory, and the iterative optimization is carried out.

Claims5

Dependent claims

A float-discrete differential dynamic programming successive approximation method for cascade reservoir group scheduling, comprising the following steps:

S1, raising a water level of a cascade reservoir group from small to large according to water surface areas of reservoirs;
S2, generating electricity by the cascade reservoir group after raising the water level according to incoming water;
S3, at an end of a calculation period, and obtaining an initial water level trajectory when a raised water level of the cascade reservoir group falls back to a set water level;
S4, based on the initial water level trajectory obtained, carrying out a discrete differential dynamic programming calculation of each reservoir from upstream to downstream to maximize a cascade total power generation, and obtaining an improved water level trajectory of each cascade reservoir;
S5, taking the improved water level trajectory of each cascade reservoir as an initial trajectory, and carrying out an iterative optimization according to S4 until the water level trajectory of each cascade reservoir is unchanged or a total power generation value during a cascade calculation period is unchanged.

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Dependencies are inferred from the claim text.