CN105119384A - High risk and important client remote monitoring system - Google Patents

Abstract

The remote monitoring system for high-risk and important customers belongs to the technical field of power system monitoring. The present invention solves the problem that the existing power monitoring system does not have a standardized and modularized integrated system, and the monitoring strength and precision are not high enough. The present invention includes on-site monitoring layer, communication network layer and system management layer; on-site monitoring layer adopts network power meter, on-site monitoring device, 10kV microcomputer integrated protection device, transformer temperature controller and DC screen controller arranged in low-voltage power distribution cabinet Collect field data; the communication network layer includes fieldbus communication network and Ethernet communication network, the fieldbus communication network is used to transmit the field data collected by the field monitoring layer to the system management layer, and the Ethernet communication network is used to transmit the fieldbus communication The data of the network is transmitted to the system management; the system management uses the power monitoring and management computer and its peripheral equipment and network communication equipment to monitor and manage the field data. The invention is used in power system.

Description

High-risk and important customer remote monitoring system

technical field

The invention belongs to the technical field of power system monitoring.

Background technique

The power monitoring system uses computers, communication equipment, and measurement and control units as basic tools to provide a basic platform for real-time data collection, switch status detection, and remote control of power transformation and distribution systems. It can form an arbitrarily complex monitoring system with detection and control equipment. It plays a central role in power transformation and distribution monitoring, which can help enterprises eliminate isolated islands, reduce operating costs, improve production efficiency, and speed up the abnormal response speed in the power transformation and distribution process.

Contents of the invention

The purpose of the present invention is to solve the problem that the existing power monitoring system does not have a standardized and modularized integrated system, and the monitoring strength and precision are not high enough, and provides a remote monitoring system for high-risk and important customers.

The remote monitoring system for high-risk and important customers described in the present invention includes an on-site monitoring layer, a communication network layer and a system management layer;

The on-site monitoring layer adopts the network power meter, on-site monitoring device, 10kV microcomputer comprehensive protection device, transformer temperature controller and DC screen controller configured in the low-voltage power distribution cabinet to collect on-site data;

The communication network layer includes a fieldbus communication network and an Ethernet communication network. The fieldbus communication network is used to transmit field data collected by the field monitoring layer to the system management layer, and the Ethernet communication network is used to transmit data from the fieldbus communication network to the system. management;

The system management uses the power monitoring and management computer and its peripheral equipment and network communication equipment to monitor and manage the field data.

The advantages of the present invention are: the remote monitoring system for high-risk and important customers is an integrated system whose software and hardware can realize standardization and modularization, and can be configured in a centralized or distributed manner. Through the remote monitoring system for high-risk and important customers, it is possible to realize the real-time interaction between the electricity inspectors and some important users, to grasp the real-time information of the operation of the user's substation, and to monitor all the electrical equipment of the user from the switching station to the low-voltage power distribution room. "Remote signaling, telemetry, remote control, and remote adjustment" to closely monitor the operation of high-risk and important customer substations in real time. In the event of a failure or emergency, the power inspector can make judgments based on relevant information to reduce accident losses and avoid Accidents are magnified to achieve the purpose of ensuring the safe use of electricity for users and the safe operation of the power grid.

The remote monitoring and management system can monitor and control various substation and distribution equipment such as high and low voltage power distribution cabinets, DC panels, transformers, UPS power supplies, and diesel generator sets; it can monitor and control the power supply quality of the power distribution system. Continuous real-time monitoring provides reliable data and information for the control of harmonic pollution, reduction of energy consumption of power supply and distribution systems, and analysis of faults and accident causes; it can ensure the operability of the system in various situations, and has the advantages of Multiple software interlocks can effectively prevent misoperation; in addition to remote control, the system also has powerful functions such as automatic fault emergency treatment and load control; it has a visual human-machine interface, which can monitor the operating status of the user's substation in real time , Automatically record various events such as parameters, fault alarms and operation content, and the management is fully automated; it has an open communication interface, and can communicate with IBMS and other computer systems to upload data in various ways such as OPC, thus becoming a distribution network An integral part of the automation system or electrical equipment automation monitoring and management system; its high degree of intelligence can realize real-time interaction between electricity inspectors and user substations, and can reduce the number of users on duty in substations; The electricity safety of important customers and the safe and stable operation of the power grid have achieved good economic and social benefits.

Description of drawings

Fig. 1 is a functional block diagram of the remote monitoring system for high-risk and important customers of the present invention.

detailed description

Specific embodiment one: the present embodiment is described below in conjunction with Fig. 1, the high-risk and important customer remote monitoring system described in the present embodiment, it includes on-site monitoring layer, communication network layer and system management layer;

The on-site monitoring layer adopts the network power meter, on-site monitoring device, 10kV microcomputer comprehensive protection device, transformer temperature controller and DC screen controller configured in the low-voltage power distribution cabinet to collect on-site data;

The communication network layer includes a fieldbus communication network and an Ethernet communication network. The fieldbus communication network is used to transmit field data collected by the field monitoring layer to the system management layer, and the Ethernet communication network is used to transmit data from the fieldbus communication network to the system. management;

The system management uses the power monitoring and management computer and its peripheral equipment and network communication equipment to monitor and manage the field data.

Specific implementation mode 2: This implementation mode further explains the implementation mode 1. The specific method for monitoring the 10kV high-voltage power distribution cabinet at the on-site monitoring layer is: use 10kV microcomputer comprehensive protection device and network power meter for real-time monitoring. The parameters and signals monitored include: : Three-phase voltage, three-phase current, zero-sequence voltage, zero-sequence current, frequency, power factor, power, electric energy, status signal of circuit breaker switch, fault trip signal, ground fault signal, circuit breaker position signal, isolated handcart position signal, spring energy storage state signal, grounding knife position signal, automatic and manual state signal, control circuit disconnection signal, fault trip signal and internal fault signal of 10kV microcomputer comprehensive protection device; among them, the three-phase voltage includes phase voltage and line voltage ;Power includes active power, reactive power and apparent power; electric energy includes active energy and reactive energy.

In this embodiment, the on-site monitoring layer can record 12 analog and 64 switch signal channels, and can record up to 100 fault recordings, up to 20 seconds. Analog channels can record waveforms or trends of measured current and voltage. 512 time-stamped event (SOE) records can be recorded. The on-site monitoring layer defines 4 levels of operation authority: viewer, operator, engineer and administrator.

Specific implementation mode three: This implementation mode further explains implementation mode one. The specific method for on-site monitoring layer to monitor the transformer is: the on-site monitoring layer uses the transformer temperature controller to monitor data in real time. The monitoring data includes: the temperature of the three-phase winding, super Temperature alarm signal and cooling fan run/stop and fault alarm signal.

Embodiment 4: This embodiment further explains Embodiment 1. The specific method for the on-site monitoring layer to monitor the DC screen is: the on-site monitoring layer uses the DC screen controller to monitor data in real time. The monitoring data includes: output bus voltage, battery voltage , battery current, battery internal resistance, output bus overvoltage, undervoltage, device power failure alarm signal, incoming power supply status signal, insulation drop, system ground fault signal, DC fault signal, high frequency switching power supply module fault signal, controller Fault signal, float charge, equal charge and early warning, single battery failure alarm and fault signal.

Specific implementation mode five: This implementation mode further explains implementation mode one. The specific method for on-site monitoring layer to monitor the 400V low-voltage power distribution system is: the on-site monitoring layer uses the network power meter configured in the low-voltage power distribution cabinet to monitor the 400V open circuit in real time The monitoring data includes: three-phase voltage, three-phase current, single-phase current, frequency, power factor, power, circuit breaker opening and closing signal, fault signal, active energy, reactive energy, 4 DI quantities, 2 way DO quantity.

In this embodiment, the monitoring accuracy of the network power meter in the low-voltage power distribution cabinet is: the accuracy of voltage and current is 0.2%, and the accuracy of active power and reactive power is 0.5%.

Claims (5)

1. A remote monitoring system for high-risk and important customers, characterized in that it includes an on-site monitoring layer, a communication network layer and a system management layer; The on-site monitoring layer adopts the network power meter, on-site monitoring device, 10kV microcomputer comprehensive protection device, transformer temperature controller and DC screen controller configured in the low-voltage power distribution cabinet to collect on-site data; The communication network layer includes a fieldbus communication network and an Ethernet communication network. The fieldbus communication network is used to transmit field data collected by the field monitoring layer to the system management layer, and the Ethernet communication network is used to transmit data from the fieldbus communication network to the system. management; The system management uses the power monitoring and management computer and its peripheral equipment and network communication equipment to monitor and manage the field data. 2. The remote monitoring system for high-risk and important customers according to claim 1, characterized in that the specific method for monitoring the 10kV high-voltage power distribution cabinet at the on-site monitoring layer is: using 10kV microcomputer comprehensive protection device and network power meter for real-time monitoring, monitoring The parameters and signals include: three-phase voltage, three-phase current, zero-sequence voltage, zero-sequence current, frequency, power factor, power, electric energy, status signal of circuit breaker switch, fault trip signal, ground fault signal, circuit breaker position signal , isolated handcart position signal, spring energy storage state signal, grounding knife position signal, automatic and manual state signal, control circuit disconnection signal, fault trip signal and internal fault signal of 10kV microcomputer comprehensive protection device; among them, the three-phase voltage includes Phase voltage and line voltage; power includes active power, reactive power and apparent power; electric energy includes active energy and reactive energy. 3. The remote monitoring system for high-risk and important customers according to claim 1, wherein the specific method for monitoring the transformer at the on-site monitoring layer is: the on-site monitoring layer uses a transformer temperature controller to monitor data in real time, and the monitoring data includes: three-phase Winding temperature, over-temperature alarm signal and cooling fan operation/stop and fault alarm signal. 4. The remote monitoring system for high-risk and important customers according to claim 1, wherein the specific method for monitoring the DC screen by the on-site monitoring layer is: the on-site monitoring layer uses a DC screen controller to monitor data in real time, and the monitoring data includes: output Bus voltage, battery voltage, battery current, battery internal resistance, output bus overvoltage, undervoltage, device power failure alarm signal, incoming line power status signal, insulation drop, system ground fault signal, DC fault signal, high frequency switching power supply module Fault signal, controller fault signal, float charge, equal charge and pre-alarm, single battery failure alarm and fault signal. 5. The remote monitoring system for high-risk and important customers according to claim 1, wherein the specific method for monitoring the 400V low-voltage power distribution system at the on-site monitoring layer is: the on-site monitoring layer adopts the network power configured in the low-voltage distribution cabinet The instrument monitors the data of the 400V circuit breaker in real time. The monitoring data includes: three-phase voltage, three-phase current, single-phase current, frequency, power factor, power, circuit breaker opening and closing signal, fault signal, active energy, reactive energy, 4 channels of DI volume, 2 channels of DO volume.