Shuai Yao

• PhD student
• Southeast University

Although global sensitivity analysis (GSA) is gaining increasing popularity in power systems due to its ability to measure the importance of uncertain inputs, it has not been explored in the integrated energy system (IES) in the existing literature. Indeed, when coupled multi-energy systems (e.g., heating networks) are considered, the power system...

作为系列论文的第二篇，本文以质调节供热系统为研究对象，在 一定假设条件下建立了其偏微分-代数方程形式的数学模 型，并推导了该模型的解析解。首先，将由一阶线性双曲 线偏微分方程描述的管道模型转化为初值问题和边值问 题的交集。基于此，提出了一种双边特征线法用于推导管 道模型的解析式，并对解析式进行了理论验证。最后，根 据温度传输路径的划分，将解析解从单一支路推广至网 络，建立了热网的源-荷二端口模型。算例分析表明，热 网解析法可以有效降低分析复杂度， 相较于传统的差分方法具有明显的精度和效率优势。

建模和仿真是将真实系统及其物理过程抽象化为适当的数学形式，并采用数学方法求解以模拟真实系统行为或性能的过程。为综合能源系统在各时间尺度的物理过程建立恰当的数学模型并进行仿真验证，是分析系统运行规律、优化运行策略以及评估运行性能的基础。本文围绕电气热综合能源系统建模和仿真问题，首先介绍了电气热子系统和耦合设备的机理模型，总结建模研究的进展与难点。进一步，从仿真框架、算法以及改进策略三个方面介绍了综合能源系统仿真技术所取得的研究进展。特别地，总结了数值法、半解析法、解析法的原理、应用现状及其难点。最后，围绕现存技术难点，从建模和仿真算法两个方面对未来研究进行了展望。

Energy flow analysis is a fundamental tool to determine the network states of the integrated energy systems (IES). For the widely deployed IES with coupled power grids (PG) and heating networks (HN), we still lack a generic tool that can be easily employed to calculate the quasi-dynamic energy flows of it. In this paper, we have developed a generic...

p>Energy flow analysis is a fundamental tool to determine the network states of the integrated energy systems. For the widely deployed IES with coupled power grids (PG) and heating networks (HN), we still lack a generic tool that can be easily employed to calculate its quasi-dynamic energy flows. In this paper, we have developed a generic code pack...

p>Energy flow analysis is a fundamental tool to determine the network states of the integrated energy systems. For the widely deployed IES with coupled power grids (PG) and heating networks (HN), we still lack a generic tool that can be easily employed to calculate its quasi-dynamic energy flows. In this paper, we have developed a generic code pack...

Simulation and operation optimization studies on the integrated energy system have received extensive attention recently for its potential in improving energy efficiency and increasing grid integration of renewable energy, where the task of energy flow calculation serves as a fundamental tool to determine the network states. This paper investigates...

The worldwide promotion of electric heating improves the operational flexibility of the power system (PS), but it also increases the risk of cascading failure due to the bi-directional interaction with the heating system (HS). To anticipate these contingencies timely and guide the post-outage adjustments, the steady-state security region (SSR) of t...

The thermal inertia of buildings brings considerable flexibility to the building heating and cooling loads, which is believed to be a promising demand response resource in energy systems. However, it is challenging to utilize the thermal inertia of buildings in the operation of energy systems because of the complicated thermal dynamics and high com...

Quasi-dynamic energy flow calculation is an indispensable tool for the heat and electricity integrated energy system (HE-IES) analysis. One solves the nonlinear partial differential algebraic equations to obtain thermal, hydraulic and electric variations. However, mainstream iteration solvers face the challenges of inefficiency and bad robustness....

Energy flow calculation plays a vital role in the analysis, operation, and control of heat and electricity integrated energy systems (HE-IESs). The quasi-dynamic energy flow models of HE-IESs are essentially partial differential equations (PDEs) (governing thermal inertia) and non-linear algebraic equations (AEs) (governing temperature, hydraulics,...

Modeling of district heating network (DHN) is significant for the dynamic simulation of the heat and electricity integrated energy system (HE-IES). However, the computational accuracy and stability of the DHN model have not been fully addressed in traditional numerical methods. This paper proposes a novel DHN model to describe the thermal dynamics....

Intensified interaction between electric power system (EPS) and district heating network (DHN) has raised an urgent requirement of security control to ensure the regular operation of the heat and electricity integrated energy system (HE-IES). However, the implicit expressions of thermal dynamics remain an obstacle to building the quantitative relat...

United thermal equation combines the measurement and state variables. • State estimation framework for district heating network with incomplete measurements. • Two typical regulation modes are considered. • A linear least-squares algorithm is developed for model of quality regulation. • A bi-level optimization algorithm is developed for model of qu...

A power to hydrogen and methane (P2HM) plant can couple three different energy sectors including electricity, natural gas, and hydrogen, showing great potentials in supporting the penetration of renewable energy sources. This paper develops a bi-level strategic bidding model of a profit-driven P2HM plant from both market and technology perspectives...

Wide development of the heat and electricity integrated energy system (HE-IES) has provided flexible multi-energy optimization management, which improves energy efficiency and benefits the environment. It is essential to calculate energy flow quickly, accurately, and reliably as the system scale and complexity increase. To handle this problem, we p...

The heat and electricity integrated energy system (HE-IES) has high energy efficiency and bright application prospects. In the HE-IES, the heat transmission in the heating network and the indoor temperature variation in the buildings are governed by (partial) differential equations, which bring the heat dynamics problem in the system operation. In...

The integrated energy system (IES) has bright prospects in engineering applications for its excellent performance in energy efficiency and renewable energy consumption. In the IES, the thermal comfort is affected by the heating power, buildings parameters, and outdoor temperatures simultaneously. Therefore, the uncertainty of outdoor temperature wi...

Integrated energy systems (IESs) are composed of multiple heterogeneous subsystems, i.e., electrical power system, natural gas system, and district heating system (DHS), which endow the whole system with excellent performance in overall efficiency and renewable energy utilization. The paper aims to offer a concise and analytical model for the therm...

The increasingly wide application of technologies such as combined heat and power (CHP) systems and micro energy management systems has enhanced coupling of various types of energy. In this paper, a generalized Nash game model is built in this paper to simulate the multi-round auction in combined heat and power market (CHPM). In this model, the con...

For the future development of an integrated energy system (IES) with ultra-high penetration of renewable energy, a planning model for an electricity-hydrogen integrated energy system (EH-IES) is proposed with the considerations of hydrogen production and storage technologies. In this EH-IES, a reasonable power to heat and hydrogen (P2HH) model with...

The IES (Integrated Energy System) integrates multiple energy subsystems, i.e., electrical system, gas system, heating system, and so on. The dynamic/static characteristics and device control characteristics of different energy systems are significantly different. In order to realize coordinated operation of the heterogeneous energy networks and de...

To better accommodate the uncertainty introduced by renewables and loads, a hybrid timescale dispatch hierarchy for the combined heat and power system is constructed in this paper, which coordinates the stages of day-ahead dispatch, intraday rolling dispatch, real-time dispatch, and automatic generation control to decompose the uncertainty step by...

The proliferation of technologies such as combined heat and power systems and smart meters has accelerated the multi-energy trading. A two-stage game model is built in this paper to analyze the optimal strategy of each player and their interactions. Specifically, in consumer game model, we present an autonomous and distributed micro energy manageme...