The decline of system inertia due to the increasing displacement synchronous units by renewable has introduced a major challenge on frequency dynamics management power system. This paper discusses how fast-response battery energy storages can be used maintain dynamic security. Immediately following generation loss, injections batteries are adjusted instantly ensure minimum imbalance in control strategy is included novel formulation constrained unit commitment, which impact wind uncertainty...

The increasing growth in the installation of natural-gas fired units has raised necessitates on synergy between electricity and natural gas networks. This paper discusses how synergistic operation networks can be achieved a distributed fashion using alternating direction method multipliers (ADMM). A standard ADMM approach consensus-based are developed, respectively, to solve gas-electric integrated optimal power flow problem with without coordination operator. In both cases, optimization...

In this paper, we develop a generalized multi-state degraded system reliability model subject to multiple competing failure processes, including two degradation and random shocks. The operating condition of the systems is characterized by finite number states. We also present methodology generate states when there are multi-failure processes. can be used not only determine in context functions, but obtain calculating state probabilities. Several numerical examples given illustrate concepts.

In some applications, the failure rate of system depends not only on time, but also upon status system, such as vibration level, efficiency, number random shocks etc., which causes degradation. this paper, we develop a generalized condition-based maintenance model subject to multiple competing processes including two degradation processes, and shocks. An average long-run cost function is derived based expressions for paths & cumulative shock damage, are measurable. A geometric sequence...

This study presents a systematic way to evaluate reliability performance of large grid-connected photovoltaic (PV) power systems considering variation input and ambient-condition-dependent failure rates critical components including PV modules, inverters, capacitors. State enumeration is used analyze real-life systems. Ambient-condition-dependent major in are formulated incorporated analysis. A series indices defined quantify systems' performance. In addition, sensitivity analyses...

With the growing trend of extreme weather events in Northeast U.S., a region dense vegetation, evaluating hazard effects wind storms on power distribution systems becomes increasingly important for disaster preparedness and fast responses utilities. In this paper, probabilistic storm models study have been built by mining 160-year recorded National Oceanic Atmospheric Administration's Atlantic basin hurricane database (HURDAT). Further, are classified into six categories according to NOAA...

This paper proposes a probabilistic power flow analysis technique based on the stochastic response surface method. The probability distributions and statistics of responses can be accurately efficiently estimated by proposed method without using series expansions such as Gram-Charlier, Cornish-Fisher, or Edgeworth series. continuous input variables following normal loads non-normal photovoltaic generation wind their multiple correlations easily modeled. correctness, effectiveness...

This paper presents a Monte Carlo based generation system reliability evaluation method that can accurately model correlations between multiple wind speeds following different probability distributions. The assumption of normal distribution in the traditional correlation matrix is eliminated. Applications to Weibull, Burr, lognormal and gamma distributions which are popular for speed representation analyzed detail. procedure considering developed. IEEE-RTS with four additional farms whose...

This paper presents a probabilistic optimal power flow (POPF) technique considering the correlations of wind speeds following arbitrary probability distributions based on point estimation method (PEM). Correlated different are transformed into random variables correlated normal and then independent so that traditional 2m+1 can be applied to solve with speed correlations. The IEEE 14-bus system, 118-bus system an actual utility in southwest China additional farms used demonstrate...

As a key technology in smart grid, the wide-area measurement system (WAMS) will gradually become an important guarantee for security and stability of future power systems. This paper presents quantified reliability evaluation method backbone communication network WAMS overall from hardware viewpoint. The whole is modeled using hierarchical structure. Markov modeling state enumeration techniques are combined to perform evaluation. IEEE 14-bus used as example demonstrate application presented...

Wind turbine power converter system (WTPCS) is a crucial device in wind energy conversion system. This paper presents the new failure rate models and reliability evaluation technique for considering effects of speeds, which can be named by multistate probability analysis method. The case studies on WTPCS 2 MW with permanent magnet synchronous generator are conducted using speed data at Lauwersoog Valkenburg sites Holland. results indicate that affected significantly variations rated turbine....

For grid-connected microgrids with high penetration of photovoltaic (PV) generation, overvoltage caused by reverse power flow is a major factor that limits PV output. To tackle the challenge, this paper proposes new online prevention (OOP) control strategy to maintain terminal voltages within specified range while maximizing energy yields. The proposed method based on precise active limit prediction using dynamic Thevenin equivalent. output array can be modulated in real time such voltage at...

This paper analyzes the reliability of large scale battery storage systems consisting multiple modules. The whole system assessment is based on evaluation components including individual modules and power electronic converters. In order to evaluate a module, model state health cells introduced. cell calculated capacity fade using weighted Ampere-hour throughput method. A universal generating function-based method then introduced module. dc/ac converters also presented in this paper. analysis...

With the development of energy intelligent technology, integrated system (IES) has been widely used in field supply. While IES significantly improves efficiency, interaction between different systems may also bring multiple operational risks to reliability supply, which necessitates an effective assessment technique. Considering dynamic characteristics gas and heat can reduce losses during contingencies, provides instrument improve reliability. This paper for first time contributes a novel...