Identification of current leakage in distribution networks based on automated meter reading and control system (AMR)

At present, in order to automate and informative processes in distribution zones (DZ) with a voltage of 0.4 kV, new technologies have found wide application in the form of automated meter reading and control system (AMRCS). However, as part of these information systems, there are no technologies focused on solving diagnostic problems. The report proposes methodological and algorithmic foundations for constructing a subsystem for diagnosing the states of wires of the main lines of DZ. Diagnostic criteria are formulated based on the assessment of the level of their run-out. The research results are aimed at improving the existing AMRCS and increasing the reliability of distribution networks.

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An Adaptive Differential Protection and Fast Auto-Closing System for 10 kV Distribution Networks Based on 4G LTE Wireless Communication

Future Internet ◽

10.3390/fi12010002 ◽

2019 ◽

Vol 12 (1) ◽

pp. 2 ◽

Cited By ~ 1

Author(s):

Wen An ◽

Jun Jie Ma ◽

Hong Yang Zhou ◽

Hong Shan Chen ◽

Xu Jun ◽

...

Keyword(s):

Control System ◽

Wireless Communication ◽

Power System ◽

Power Supply ◽

Distribution Networks ◽

Fault Isolation ◽

Differential Protection ◽

Current Differential Protection ◽

Protection And Control ◽

And Control

With the development of wireless communication technology and computer technology, more and more smart technologies have been applied in electricity distribution networks. This paper presents an adaptive current differential protection and fast auto-closing system for application in 10 kV distribution networks in China Southern Power Grid. The current differential protection can adaptively change its settings according to the topology change of the primary distribution networks, thus the system effectively reduces the operation and maintenance cost of the power distribution network. In order to restore the power supply for the healthy part of the 10 kV networks quickly after a power system fault is cleared, the protection and control system provides wide area control function for automatic fault isolation and automatic switching. The traditional overcurrent protection and control system have no fault location function, it may take several minutes or even hours to manually locate a fault and then restore the power supply. Compared with the protection and control system of the traditional 10 kV distribution networks, the system developed can locate and isolate faults within 900 ms (assuming that the operating time of the load switch is 700 ms), and can quickly restore power supply in less than one second after a power system fault is cleared.

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Systems Modelling and Control Applied to a Low-Pressure Gas Distribution Network

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1243/pime_proc_1992_206_196_02 ◽

1992 ◽

Vol 206 (1) ◽

pp. 35-44 ◽

Cited By ~ 1

Author(s):

J S Parkinson ◽

R J Wynne

Keyword(s):

Control System ◽

Distribution Networks ◽

Low Pressure ◽

Effective Control ◽

Gas Distribution ◽

Control Scheme ◽

Systems Modelling ◽

And Control ◽

Low Pressures ◽

Selection Of

A control system has been designed and implemented to provide more effective energy management of low-pressure gas distribution networks. The key to this is the provision of a control scheme that maintains low pressures across a network. The work was approached from first principles and a modelling technique has been developed which provides reduced order models that adequately describe the characteristics of multi-feed gas networks. The models were then used for the control system design, which in this case also included the selection of the optimal measurement points for most effective control. Following extensive design studies a relatively straightforward control scheme resulted which has been implemented and proved to be effective.

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Digital Control of Electric Power Flows in Unbalanced Distribution Networks as Part of The Automated Metering and Control System

Energy Systems Research ◽

10.38028/esr.2021.01.0005 ◽

2021 ◽

pp. 38-46

Author(s):

T. Omorov ◽

B. Takyrbashev ◽

K. Zakiriaev ◽

T. Koibagarov

Keyword(s):

Control System ◽

Power Distribution ◽

Distribution Network ◽

Distribution Networks ◽

Digital Controller ◽

Information Control ◽

Power Distribution Networks ◽

Voltage Unbalance ◽

Three Phase ◽

And Control

This paper aims to address the problem of controlling the electricity flows in power distribution networks (PDN) operating under current and voltage unbalance. As is known, the unbalance factor is responsible for significant losses of active power and, therefore, is detrimental to the PDN efficiency and technical and economic performance. The purpose of control is to minimize technical power losses in the distribution network. This is to be achieved by building an information control system (ICS) for balancing a three-phase network as part of the automated metering and control system (AMCS). The latter is currently being widely adopted to automate information processes in PDNs. However, the AMCS does not include technologies for solving the problem in question. We propose an algorithm of the digital controller operation for the ICS. Its primary function is to maintain phase power at a given level in real-time. The algorithm concept is based on the idea of required redistribution of electricity flows between the phases of the distribution network by appropriately switching single-phase loads of consumers (users) to ensure a minimum spread of phase powers relative to their required level. To achieve the goal of control, we construct criterion functions that determine qualitative indices of the ICS operation and develop computational schemes for their minimization. Control actions to be generated by the digital controller and performed on the facility represent a digital code that contains data on the coordinates of three-phase network loads to be switched to another phase.

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Electricy Losses Management in Distribution Network as a Composition of Automated Meter Reading and Control System (AMRCS)

Mekhatronika Avtomatizatsiya Upravlenie ◽

10.17587/mau.22.191-199 ◽

2021 ◽

Vol 22 (4) ◽

pp. 191-199

Author(s):

T. T. Omorov ◽

B. K. Takyrbashev ◽

T. D. Koibagrov

Keyword(s):

Control System ◽

Distribution Network ◽

Asymmetry Factor ◽

Main Function ◽

Electric Networks ◽

Criterion Functions ◽

Three Phase ◽

Automated Meter Reading ◽

Technical And Economic Indicators ◽

And Control

The problem of electricity losses management in distribution electric networks (DEN) operating in conditions of asymmetry of currents and voltages is reviewed. As it is known, the asymmetry factor leads to significant losses of active power and, as a result, decreases the efficiency and technical and economic indicators of the DEN. The purpose of the control is to minimize technical energy losses in the distribution network based on the creation of an automatic control system (ACS) for the process of balancing a three-phase network in the composition of automated meter reading and control system (AMRCS). The latter are currently being widely implemented to automate information processes in DEN. However, AMRCS does not include in its composition technologies designed to solve the problem under review. A method is proposed for constructing a digital ACS controller, the main function of which is to maintain phase currents at the network input at a given level in real time. The concept of the method is based on the idea of the desired redistribution of electricity flows between the phases of the distribution network by appropriate switching of single-phase consumers (customers) so that the minimum spread of phase currents from their specified level is ensured. To achieve the goal of control, criterion functions are constructed that determine the qualitative indicators of the functioning of the ACS. Algorithms for the functioning of the digital controller and the formation of control actions on the subject have been developed. The latter are a digital code containing data on the coordinates of electricity meters of consumers of a three-phase network to be switched to another phase.

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An integrated protection and control system for 10kV electricity distribution networks based on package transmission communication network

2016 China International Conference on Electricity Distribution (CICED) ◽

10.1109/ciced.2016.7575992 ◽

2016 ◽

Cited By ~ 1

Author(s):

Liu Kun ◽

Wen An ◽

Jin Xin ◽

Huang Weifang ◽

Wei Chengzhi ◽

...

Keyword(s):

Communication Network ◽

Control System ◽

Distribution Networks ◽

Electricity Distribution ◽

Protection And Control ◽

And Control

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Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽

10.32964/tj8.1.4 ◽

2009 ◽

Vol 8 (1) ◽

pp. 4-11

Author(s):

MOHAMED CHBEL ◽

LUC LAPERRIÈRE

Keyword(s):

Control System ◽

Nonlinear Behavior ◽

Simulation Software ◽

Pulp And Paper ◽

Pid Controllers ◽

Tuning Parameters ◽

Pid Tuning ◽

Fixed Set ◽

And Control ◽

Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

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