This paper proposes a tube model predictive control method considering uncertainties of renewable energy generation in the low-voltage distribution network. For relatively low dependence on communication networks, decentralized voltage framework is urgently needed to be developed for regulation Opposed traditional techniques, novel (TMPC) strategy proposed. First, this entails formulation discrete encompassing distributed photovoltaic units and storage systems intertwined with grid based...

The distribution network with high penetration of renewable energy such as wind and photovoltaic power has higher flexibility supply efficiency, but it also faces more faults uncertainties. Traditional dynamic reconfiguration under fault conditions are still limited by problems low load recovery rate strong decision conservatism. To overcome these challenges, this article proposes a reconstruction strategy for that takes into account multivariate uncertainty. Firstly, in response to the...

In recent years, sub-synchronous oscillation accidents caused by wind power integration have received extensive attention.The recorded constant-amplitude waveforms can be induced either linear or nonlinear mechanisms.Hence, the behavior needs to distinguished prior choosing analysis method.Since 1960s, higher-order statistics (HOS) theory has become a powerful tool for detection of (DNB) in production quality control wherein it mainly been applied mechanical condition monitoring and fault...

Current measuring is the core precondition for relay protection, energy metering and Rogowski coil one of most favorable transformers. In this paper, effects geometrical parameters on its performance are calculated compared to provide a general overview selection. The expressions mutual inductance rectangular, circular oval winding derived calculated, reliabilities each shape by simulation. results show that in condition equal section area, descending sequences relative error smallest, which...

The scheme of secondary equipment outdoor layout in smart substation has become the development trend constructing substation. In this study, some schemes about relay protection using electronic transformer are provided and compared, which is mainly focused on technical ideas, implementation plan their advantages disadvantages engineering application. addition, aiming at problem changing testing, operation maintenance work under new mode, authors provide a brief introduction assembly line...

The reliable operation of the relay protection equipment and its secondary circuit is an important factor to ensure safety stability power grid. It great significance improve maintenance efficiency circuit. In this paper, design intelligent mobile management system based on wireless virtual private network elaborated, including architecture deployment mode communication network. addition, information synchronization methods between statistical analysis module, condition-based assistant...

Accurate and reliable instrument transformers play an important role in power system measurement protection. This paper focuses on the phase accuracy of electronic presents adaptive phase-shift compensation method for measuring current transformers. Different from existing approaches which empirical evaluation fixed are used, proposed measures displacement real-time calibrates corresponding error adaptively, with aim achieving high accuracy. In particular, several practical factors...

This paper proposes the idea of evaluation system, with trend and loss model secondary device set up, which is useful for equipment condition monitoring assessment in smart substation. Multi-parameter identification method firstly introduced, by “horizontal comparison longitudinal check”, correction state can be guaranteed. Standard score different parameters also given.

Due to the technique and economic considerations, transmission lines in power grid are usually untransposed, which leads result that line parameter is asymmetric. For double-circuit on same tower, asymmetric parameters may cause unbalanced currents even under normal operation, will have a negative impact temperature, loss relay protections. This paper firstly investigates current characteristics of tower operating mode. Then, we provide method analyze including circulating net through...

Abstract The energy management issue of a smart grid is the key to efficient and stable operation grid. Due large number distributed sources connected, centralized dispatch method no longer applicable, uses algorithms for dispatch. In this paper, based on modeling analysis problem, algorithm designed by combining consistency theory in multi-intelligent body systems. First, scheduling under ideal communication conditions. Then, correctness verified MATLAB simulation platform two conditions...

Solar radiation forecasting is the basis of building a robust solar power system. Most ground-based methods are unable to consider impact cloud changes on future radiation. To alleviate this limitation, study develops hybrid network which relies convolutional neural extract motion patterns from time series satellite observations and long short-term memory establish relationship between information, as well antecedent measurements. We carefully select optimal scales spatial temporal...

The development of high-voltage direct current(HVDC) transmission system to determine the transient performance calibration DC current transformer is described. A set step source based on signal resampling and pre-distorting adjustment devised carry out on-site test. By root mean square error(RMSE) revision, produces up 300A with 500kHz sampling speed restore initial waveform. With source, transformers for pole converter valve measuring in Sunan 500kV UPFC Project was tested, rising time,...

The increased construction and reconstruction of smart substations has exposed a problem with version management substation configuration description language (SCL) files due to frequent changes. This paper proposes comparative approach for differentiation SCL files. A comparison model is built in this method, which based on the structure abstract defined by IEC 61850. proposed adopts algorithms depth-first traversal, sorting, cross order rapidly identify differences changed can also be...

Multi-port Power Electronic Transformer (PET) can establish a flexible power circulation path in the AC/DC hybrid distribution network to achieve inter-regional energy interconnection and mutual support. This paper proposes an economic operation strategy of based on multi-port PET. Firstly, typical topology network, regulation capability including PET is analyzed. Then, according physical constraints during PET, flow relationship each port analyzed, model established. Finally, taking lowest...

Fiber Optic Current Transformer (FOCT) realizes current measurement by using the Faraday magneto-optical effect. With advantage of unsaturation, wide dynamic range and immunity to electromagnetic interference etc, FOCT is widely used in smart substation HVDC transmission, so accuracy reliability long-term operated have become focus attention[1-3]. In this paper based on structure principle FOCT, AC DC transient response characteristic are analyzed ; influence factors researched(include...