Method for flexible coordinated operation of urban distribution network and watershed network

Patent metadata

Field	Value
Publication number	US-12401222-B2
Application number	US-202318186999-A
Country	US
Kind code	B2
Filing date	Mar 21, 2023
Priority date	Sep 6, 2022
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A method for flexible coordinated operation of an urban distribution network and a watershed network, including: constructing a watershed network dynamic operation model; constructing a river water storage model a lake water storage model based on the watershed network dynamic operation model; constructing a distribution network linear alternating-current (AC) power flow model and an operating power-flow rate operation model of the pump stations to obtain a coordinated operation model of the urban distribution network and the watershed network; constructing a watershed-electricity composite sensitivity matrix; quantifying a time-varying adjustable power domain of each pump station through a pump station flexibility assessment method based on the watershed-electricity composite sensitivity matrix; constructing a power flow optimization model of the urban distribution network and a hydraulic energy flow optimization model of the watershed network; and performing electricity-water energy flow interactive optimization involving a flexible resource of the pump stations.

First claim

What is claimed is:

1. A system for flexible coordinated operation of an urban distribution network and a watershed network, comprising:
one or more generators configured to provide electrical energy to one or more drainage pump stations distributed in the watershed network;
a distribution network coupled to the one or more generators, the one or more drainage pump stations and a main grid, wherein the distribution network is configured to transmit electrical energy; and
a controller;
wherein the controller comprises a processor and a memory coupled to the processor; and the controller is in communication with the one or more generators, the one or more drainage pump stations, and the main grid;
wherein the controller is configured to perform:
(a) constructing a watershed network dynamic operation model based on a de Saint-Venant nonlinear-hyperbolic-partial differential equation system;
(b) constructing a river water storage model and a lake water storage model based on the watershed network dynamic operation model;
(c) constructing a distribution network linear alternating-current (AC) power flow model; and based on the watershed network dynamic operation model and the distribution network linear AC power flow model, constructing an operating power-flow rate operation model of the one or more drainage pump stations to obtain a coordinated operation model of the urban distribution network and the watershed network;
(d) constructing a watershed-electricity composite sensitivity matrix by using Taylor series expansion to reflect a mathematical relationship between variation of water level at individual points of the watershed network and a power increment of the one or more drainage pump stations, and a mathematical relationship between variation of flow rate at individual points of the watershed network and the power increment of the one or more drainage pump stations;
(e) quantifying a time-varying adjustable power domain of a load of each of the one or more drainage pump stations through a pump station flexibility assessment method based on the watershed-electricity composite sensitivity matrix;
(f) constructing a power flow optimization model of the urban distribution network and a hydraulic energy flow optimization model of the watershed network; and converting a non-convex nonlinear hydraulic energy flow optimization problem into a mixed-integer linear programming problem through a multidimensional piecewise linearization method; and
(g) based on the coordinated operation model, the time-varying adjustable power domain, the flexibility assessment method, the power flow optimization model and the hydraulic energy flow optimization model, performing electricity-water energy flow interactive optimization involving a flexible resource of the one or more drainage pump stations to realize the flexible coordinated operation of the urban distribution network and the watershed network;
wherein the time-varying adjustable power domain is quantified through steps of:
estimating the time-varying adjustable power range of each of the one or more pump stations;
successively calculating the watershed-electricity composite sensitivity matrix and an adjustment amount; and
correcting the time-varying adjustable power domain until there is no water level out of a preset limit;
the time-varying adjustable power domain is estimated through steps of:
obtaining a baseline power consumption of the load of each of the one or more pump stations through optimal scheduling of the watershed network under a basic scenario; and estimating the time-varying adjustable power domain of each of the one or more pump stations using equation (41):

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Assignees

• Univ Hunan

Inventors

• Zhou Bin
• Hua Zhihao
• Shuai Zhikang
• Zhou Quan
• Li Jiayong
• Zhang Cong
• Cao Yingping

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J13/12 Primary

  Monitoring network conditions, e.g. electrical magnitudes or operational status · CPC title

• H02J2103/35

  Grid-level management of power transmission or distribution systems, e.g. load flow analysis or active network management · CPC title

• H02J2105/12

  supplying households or buildings · CPC title

• H02J2101/00

  Supply or distribution of decentralised, dispersed or local electric power generation · CPC title