Simulation of the insulation monitoring system of the high-voltage electrical network of a vehicle with a hybrid power plant

The paper presents the results of mathematical and simulation modeling, as well as calculated and experimental dependencies, which make it possible to evaluate the operation of the insulation resistance monitoring system of the high-voltage power grid of a hybrid vehicle. The work also provides circuits for measuring insulation resistance, a mathematical model in the MATLAB Sim-ulink environment, and the peculiarities of the operation of the software and hardware simulation complex. The aim of the work is to obtain the most reliable mathematical and physical model of insulation resistance, to determine the architecture of a high voltage battery with the IRM system included in it, to identify the key functions and characteristics of the IRM system, to test the simulation system. The introduction justifies the importance of the IRM system and provides references to standards that govern the requirements for measuring and identifying utility faults. The block diagram of the high voltage battery control system is presented. The composition of its main elements is described. The functions and key characteristics of the IRM system are considered, typical characteristics of insulation monitoring systems are given. A schematic diagram of determining the insulation resistance of conductors and an electric circuit is clearly considered. An equivalent circuit of a differential DC amplifier with a unipolar power supply is presented, which is used to amplify small differential voltages on a shunt when changing large common-mode voltages, which is part of the measuring circuit. Mathematical and simulation modeling was carried out to evaluate the method for calculating the insulation resistance according to the well-known scheme, which is used when measuring using the three-voltmeter method. There was considered the mode of checking the the insulation control system, when several test procedures performed containing simulation of the fault and operating condition of the insulation by connecting and measuring the test resistance. The results of physical simulation of the IRM system and measurement of insulation resistance, voltage between each of the high voltage supply wires and the high voltage battery case, voltage between the wires, battery voltage were obtained. The actual insulation resistance was calculated. The conclusions explain the effectiveness of physical and simulation modeling, obtaining a reliable mathematical model and low error in modeling the insulation characteristics.

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Mathematical Model of Hybrid and Electric Cars Control System

E3S Web of Conferences ◽

10.1051/e3sconf/202132001014 ◽

2021 ◽

Vol 320 ◽

pp. 01014

Author(s):

Vladimir Kozlovsky

Keyword(s):

Mathematical Model ◽

Control System ◽

Mathematical Models ◽

High Voltage ◽

Test Bench ◽

Hybrid Vehicles ◽

Storage Battery ◽

Battery Cell ◽

Electric Cars ◽

High Voltage Battery

The paper presents development results of the complex of simulation mathematical models of real-time and algorithms for a semi-natural test bench of the control system of a high-voltage storage battery of hybrid vehicles. They are designed to control the physical model of the test bench, simulating the characteristics of the cells of the high-voltage storage battery and other components that make up the high-voltage storage battery. This study aims to implement a complex of mathematical models and software with the required accuracy of parameters and signals that simulate the behavior of a real high-voltage battery. That intended for the development and testing of mathematical algorithms and software for the control system of a high-voltage battery of a hybrid vehicle. The main features of the developed models are an imitation of the characteristics of the cells of a high-voltage storage battery with the ability to set the initial state-of-charge (SOC) and change the charge during the operation of the model. The data were used to develop and evaluate a mathematical model of a high-voltage storage battery cell. The operating result contributes to the acceleration of the software development process for electrical complexes and control systems for high-voltage batteries for hybrid vehicles.

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Mathematical modeling of a system for monitoring the insulation resistance of a high-voltage power grid of a hybrid vehicle

Izvestiya MGTU MAMI ◽

10.31992/2074-0530-2021-47-1-89-98 ◽

2021 ◽

Vol 1 (1) ◽

pp. 89-98

Author(s):

A.N. Malyshev ◽

◽

YE.A. Grunenkov ◽

V.V. Debelov ◽

V.N. Kozlovskiy ◽

...

Keyword(s):

Mathematical Modeling ◽

Monitoring System ◽

High Voltage ◽

Power Supply ◽

Power Grid ◽

Hybrid Vehicle ◽

Insulation Resistance ◽

Insulation Monitoring ◽

Hardware Complex ◽

Software And Hardware

The paper presents mathematical models and computational and analytical dependences, which make it possible to implement a system for monitoring the insulation resistance of a high-voltage power grid of a hybrid vehicle and make it possible to formulate requirements for the physical and simulation model of the software and hardware complex of laboratory tests. The purpose of the work is to determine the main functions and characteristics of the insulation monitoring system, its features, the principle of operation and methods of monitoring the insulation resistance, drawing up requirements for the simulation system. The introduction justifies the importance of monitoring in-sulation resistance and provides references to standards that regulate the requirements for the meas-urement and determination of mains failure. The block diagram of the vehicle power supply and the role of the insulation resistance monitoring system in this diagram are presented, the features of in-sulation monitoring are explained. The principle of operation of the insulation monitoring system and the use of the most common schemes are considered. The calculated dependencies for each of the presented schemes are given. These allow calculating the insulation resistance. The procedure for measuring the insulation resistance according to the ISO standard is described and the corre-sponding equations are given. For the presented circuit, a graph that explains the principle of the system's operation, when one of the keys is closed, the voltage across the measuring resistor changes with the normal insulation state of the positive and negative power supply bus of the high-voltage system is given. The conclusions provide a generalization of the presented mathematical model and formulate the requirements for the software and hardware complex, which allows simulation and mathematical modeling of electrical systems and their components in various operating modes. The paper explains the features of the software and hardware complex that allows to simulate changes in the insulation resistance and faults of the high-voltage power supply network for a vehicle with a hybrid power plant.

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Low cost high voltage battery string monitoring system

2015 International Conference on Computing and Network Communications (CoCoNet) ◽

10.1109/coconet.2015.7411291 ◽

2015 ◽

Author(s):

Mandeep Singh ◽

Rajeev Khurana ◽

Prateek Jain

Keyword(s):

Monitoring System ◽

High Voltage ◽

Low Cost ◽

High Voltage Battery

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Verification of Control System by Physical Simulation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.472.389 ◽

2014 ◽

Vol 472 ◽

pp. 389-393

Author(s):

Wei Guo Yuan ◽

Ya Bin Wang

Keyword(s):

Mathematical Model ◽

Control System ◽

Heat Exchanger ◽

Physical Simulation ◽

Control System Design ◽

Control Module ◽

Heat Exchanger Design ◽

Simulation And Control ◽

And Control ◽

The Mathematical Model

Control system is generally verified by experiment, some of which are too difficult or high-cost to implement, while physical simulation can be substituted for experiment to verify the effectiveness of control system. The study take the heat exchanger as an example to describe the process of verification by physical simulation: Choose FLOEFD and SIMULINK as the software of physical simulation and control system design, establish the mathematical model of heat exchanger, design control module, whose output is set as an input of FLOEFD, compare the result of physical simulation and SIMULINK, if they are similar, the control module is effective.

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