The coordinated operation of an integrated electricity and heating system (IEHS) can improve overall energy efficiency provide additional flexibility. However, the inherent uncertainties pertaining to pipeline parameters ambient temperature in a district network (DHN) have not been addressed literature, although such could affect quality or even security IEHS operation. To address this issue, we propose two-stage robust scheduling model that considers heat load, dissipation coefficients...

Robust look-ahead dispatch (RLAD) is essential to manage uncertainties in power systems. As its key step, the worst-case scenario identification (WCSI) problem cast a max-min program. This computationally intensive procedure has be performed repeatedly, impairing computational efficiency of RLAD. To address this issue, an efficient RLAD scheme incorporating critical region preparation gap time proposed. The computation burden mostly transferred from online decision stage via customized...

The N-1 criterion is universally taken as the security constrains in security-constrained unit commitment (SCUC) problem. line outage distribution factors (LODF) widely used continency for its state independence and computational efficiency. However, LODF based model fails to consider reactive power voltage magnitude. This paper closes this gap by deriving modified (MLODF) on a linear flow model. proposed model, though state-independent, provides high-quality approximation of magnitudes....

As the central nerve system of power systems, control center has evolved over years into a complex communication, computation, and system. The traditional center, SCADA/EMS, was built to automate functions in electric utilities. With expansion interconnection systems advent deregulation, utility organizations require integration with business processes beyond corporate boundaries. requirement needs support new generation centers, which should be more decentralized, integrated, flexible open....

In this paper, an integrated energy system embedded with Power-to-Gas plants (IES-P2G) is proposed, in which the large-scale wind power used to produce synthetic natural gas (SNG) via P2G plants. addition, a co-optimization planning model that considers long-term transmission expansion (TEP) and grid (NGGEP) of proposed conducted. Benders decomposition applied solve mixed-integer linear programming (MILP) problem. To demonstrate environmental benefits economic feasibility, evaluated...

The power system control center has evolved over the years into a complex communication, computation, and system. traditional center, called EMS, was built to automate functions in electric utilities. With expansion interconnection of systems advent deregulation, utility organizations require integration with business processes beyond corporate boundaries. requirement needs support new generation centers, which should be more decentralized, integrated, flexible open. Grid technology offers...

The changing paradigm of electricity supply industry brings the power not only benefits economy and efficiency, but challenges to operation traditional system control centers (called SCADA/EMS), which were built automate functions in electric utilities. requirement needs support new generation centers, should be more decentralized, integrated, flexible open. Grid technology refers coordinated secured sharing computing resources among dynamic collections individuals, institutions resources....

The paper summarizes the development and operation of technical supporting systems in control centers substations China Southern Power Grid (CSG). Smart applications can be, based on functional integration data sharing, developed for complicated power grids. A brand new conceptual model next generation smart system, named Operation System (OS2), is proposed. OS2 consists all levels CSG, are linked with open standardized service buses, called Service Bus (OSB). definition, principles,...

In this paper, a new system of solar-assisted combined cooling heating and power (CCHP) equipped with energy storage is proposed. The model consists most the equipment which may be used in distributed system, especially concentrating solar (CSP) plant can store absorbed into large-capacity thermal device. Other devices are also taken consideration so as to surplus energy. Then two-level optimization strategy for capacity design, employs group search optimizer (GSO) CPLEX optimize,...

In this paper, the insulation of tap changer is checked by simulation calculation. Under normal working conditions such as loading interstage voltage or main power frequency voltage, performance can maintain a good safety boundary. However, relatively speaking, under condition insulation, it close to withstand value transformer oil. It necessary regularly sample and check water content in oil ensure that meets requirements.