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Introduction
I am working towards a novel power system aggregation and reduction technique based on feasible region projection, which makes external equivalence of a subsystem incorporating both economic and technical characteristics. This reduction method finds its application in multi-area coordinated dispatch, TSO-DSO coordination, multi-energy integration.
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Publications
Publications (44)
Inter-regional power trading plays a crucial role in optimal resource utilization. However, intra-regional operation constraints are currently not well considered in practical implementation, which may lead to internal congestions and economic loss. In this paper, a non-iterative tie-line scheduling framework taking account of both intra- and inter...
The technical virtual power plant (TVPP) is a promising paradigm to facilitate the integration of distributed energy resources (DERs) while incorporating operational constraints of both DERs and networks. Due to the limited predictability of DER generation and electric loads, the output capability of a TVPP is uncertain. In this regard, this paper...
The coordinated multi-area economic dispatch enables optimal resource utilization in a larger spatial range. To overcome drawbacks such as heavy communication burden, convergence failure, and weak scalability of iterative coordination methods, this paper proposes a fully non-iterative multi-area coordination framework. The proposed framework is bas...
The locational marginal price (LMP) theory is the foundation of nowadays electricity markets. With the rapid growth of intermittent renewable generation, new features are emerging in power systems, such as the uncertainty of power supply, the scarcity of flexibility, and the increase of distributed generation. In this situation, the electricity pri...
The virtual power plant (VPP) can aggregate small-scale distributed resources to provide flexibility for the transmission system. The flexibility provision capability of the VPP is restricted by technical operating limits of the distribution system to which distributed resources are connected. To facilitate the flexibility provision of the VPP whil...
As a newly widely used energy source, hydrogen has not yet been integrated with other energies efficiently, leading to low energy efficiency and high operating costs. This paper develops a novel cooperation model to coordinate electricity, hydrogen, and district heating systems and reduce operating costs. First, the mathematical model of electricit...
The interregional electricity market is instrumental in enhancing the economic efficiency, reliability, and integration of renewable generation within interconnected power systems. As the market boundary expands, the complexity and solution difficulty of market clearing escalate rapidly. The presence of hybrid AC and DC interconnector networks furt...
Multi-energy integrations provide great opportunities for economic and efficient resource utilization. In the mean-time, power system operation requires enough flexible resources to deal with contingencies such as transmission line tripping. Besides economic benefits, this paper focuses on the security benefits that can be provided by multi-energy...
Solar and wind resources are vital for the sustainable energy transition. Although renewable potentials have been widely assessed in existing literature, few studies have examined the statistical characteristics of the inherent renewable uncertainties arising from natural randomness, which is inevitable in stochastic-aware research and applications...
This letter proposes a novel framework for modeling the response-price relationship of intertemporally responsive loads (IRL) using historical data. This task is cast as a data-driven inverse optimization (DDIO) problem, which trains a surrogate model whose best response to electricity price most closely resembles the observed power trajectory of I...
With the increasing concern about climate change, environmental pollution, and sustainable development, the energy system is evolving towards a low-carbon form powered by a large share of renewable energy. Renewable generation from wind and solar is intermittent and volatile, posing great challenges to the secure and economical operation of power s...
The National Electricity Market (NEM) in Australia was suspended during June 15-23, 2022, with a primary attribution to the lack of available generation capacity. This incident is noteworthy because it was the first market suspension in NEM's history and took place in a major energy exporting country. In this letter, we review the outline and impac...
This two-part paper develops a non-iterative coordinated optimal dispatch framework, i.e., free of iterative information exchange, via the innovation of the equivalent projection (EP) theory. The EP eliminates internal variables from technical and economic operation constraints of the subsystem and obtains an equivalent model with reduced scale, wh...
Coordinated optimal dispatch is of utmost importance for the efficient and secure operation of hierarchically structured power systems. Conventional coordinated optimization methods, such as the Lagrangian relaxation and Benders decomposition, require iterative information exchange among subsystems. Iterative coordination methods have drawbacks inc...
This two-part paper develops a non-iterative coordinated optimal dispatch framework, i.e., free of iterative information exchange, via the innovation of the equivalent projection (EP) theory. The EP eliminates internal variables from technical and economic operation constraints of the subsystem and obtains an equivalent model with reduced scale, wh...
Coordinated optimal dispatch is of utmost importance for the efficient and secure operation of hierarchically structured power systems. Conventional coordinated optimization methods, such as the Lagrangian relaxation and Benders decomposition, require iterative information exchange among subsystems. Iterative coordination methods have drawbacks inc...
With the increasing penetration of distributed energy resources (DERs) and their participation in the electricity market, it becomes more desirable to apply distributed algorithms for resource allocation in order to address the resulting computational and communicational challenges. Most of the existing distributed algorithms for solving the networ...
This paper proposes a lifted linear decision rule (LLDR) as a photovoltaic (PV) power control strategy for distribution system voltage regulation. First, the active-reactive power control is designed as a linear function in a lifted space of PV power, which is presented as a piecewise linear function without auxiliary integer variables for benefiti...
The virtual battery (VB) provides a succinct interface for aggregating distributed storage-like resources (SLR) to interact with the utility-level system. To overcome the drawbacks of existing VB models including conservatism and neglecting network constraints, this paper optimizes the power and energy parameters of the VB to enlarge its flexibilit...
Solar and wind resources are vital for the sustainable and cleaner transition of the energy supply. Although renewable energy potentials are assessed in the literature, few studies examine the statistical characteristics of the inherent uncertainties of renewable generation arising from natural randomness, which is inevitable in stochastic-aware re...
In electricity markets, locational marginal price (LMP) forecasting is particularly important for market participants in making reasonable bidding strategies, managing potential trading risks, and supporting efficient system planning and operation. Unlike existing methods that only consider LMPs' temporal features, this paper tailors a spectral gra...
Expansion planning for transmission networks and distribution networks has been widely investigated. For those entities that manage transmission and distribution assets, it is essential to develop a collaborative plan for both networks under coupling constraints, such as a total budget limitation constraint. Here, two technical issues should be con...
In electricity markets, locational marginal price (LMP) forecasting is particularly important for market participants in making reasonable bidding strategies, managing potential trading risks, and supporting efficient system planning and operation. Unlike existing methods that only consider LMPs' temporal features, this paper tailors a spectral gra...
Abstract As typical thermostatic loads, heating, ventilation, and air conditioning (HVAC) systems possess high flexibility due to buildings' thermal inertia. It is beneficial to coordinate HVAC loads with power grid operations. However, it is difficult to model the HVAC loads of realistic buildings. A partially linear model is proposed to capture t...
The increasing penetration of distributed energy resources (DERs) in power systems has aroused interest in distributed economic dispatch (DED). While quadratic cost functions are usually adopted, those of DERs are not necessarily quadratic in practice. Existing distributed algorithms perform unsatisfying convergence rates under nonquadratic cost fu...
For the implementation of power market in China, medium- and long-term security checks are essential for bilateral transactions, of which the electricity quantity that constitutes the generation feasible region (GFR) is the target. However, uncertainties from load forecasting errors and transmission contingencies are threats to medium- and long-ter...
Multi-energy systems (MES) provide various types of energy services by coupling different energy sectors. Such coupling increases the efficiency and flexibility of the entire energy system, and at the same time, however, increases the dependencies of the load carrying capability among different types of load demand. In the MES planning stage, we al...
To incorporate the operating constraints of a virtual power plant (VPP) in transmission-level operation and market clearing, the concept of the VPP capability curve (VPP-CC) is proposed which explicitly characterizes the allowable range of active and reactive power outputs of a VPP. A two-step projection-based calculation framework is proposed to a...
The synergy among different energy carriers brings a new perspective in the demand-side flexibility provision. This paper proposes a novel concept of integrated flexibility, which is defined as the multi-energy responsive ability of a smart energy hub (SEH) to serve its terminal loads with an alterable combination of multiple energy inputs. The fea...
With an increasing penetration of distributed energy resources (DERs) in Energy Internet, there is a surge of interest in distributed economic dispatch (DED) problems. The existing literature mainly focuses on average consensus algorithms, the convergence of which remains a bottleneck in practical applications. To improve the convergence rate of DE...
Under the background of the untying of trading organization and the increasing scale of bilateral trading, aiming to deal with the conflict between the trading results of decentralized decision-making in the market and the system security, the idea of bilateral trading security pre-check is proposed in order to figure out the trading security regio...
In response to the challenge of renewable energy accommodation in China, the mechanism design of national renewable energy market (NREM) is proposed. The coordinating mechanism between the NREM and provincial day-ahead market is designed. The national green certificate market is proposed. A settlement mechanism for electricity quantity deviation is...
