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Online monitoring of primary equipment in power plants
Intelligence is an important trend in the development of power systems, with the most representative being intelligent substations. The primary equipment and cables of the substation are important components and the core of the substation. Therefore, online monitoring and accident prevention of primary equipment and cables are of utmost importance in the operation of the power station. If a single equipment and cable failure occurs in a photovoltaic power station, it will cause a huge power outage for the entire station. Our company has introduced first-class technology and equipment from the United States, Germany, Switzerland, and other countries to collect data from the primary equipment of the substation Online monitoring and fault diagnosis functions are integrated.
Ⅰ.Transformer bushing and partial discharge online monitoring device.
Technical indicators:
1. 15 synchronous and partial discharge measurement channels/each PDM measurement module
2. Frequency range: from 1MHz to 20MHz
3. Noise removal technology: based on pulse time and amplitude, time arrival method, pulse polarity identification method
4. Measurement indicators: pC/mV discharge capacity, pps pulse count, PDI (mW) discharge intensity, phase
5. Four types of diagnostic graphs: (PRPDD) phase decomposition graph, 3D graph, PHD positive/negative pulse amplitude analysis graph, and discharge trend graph
6. Alarm setting: Two level alarm and trend alarm are set based on the discharge capacity (pC, mV) or discharge intensity (mW)
7. Built in 8M memory, configured with USB, network, RS485 and other communication interfaces, and device self check function
8. Suitable for various types of partial discharge measurement sensors: BAU bushing end shield measurement sensor, ROGS Rogers coil, HFCT high-frequency current sensor, EMC capacitor coupler, RFVT RF voltage sensor, RTD-PD partial discharge measurement sensor.
Ⅱ.Online monitoring of transformer ultrasonic partial discharge
APM adopts DSP digital processing technology and comprehensively utilizes two online partial discharge detection technologies, ultrasound and electrical measurement, to detect, analyze, and locate partial discharge signals in electrical equipment through ultrasound sensors (AE) and high-frequency current sensors (HFCT). This device can be widely used for live detection of partial discharge (PD) in power transformers, GIS, circuit breakers, cables and other power equipment, and can communicate remotely to substations and control rooms through network interfaces.
Product features:
1. Continuous online monitoring, detection, and fault analysis are of great significance for tracking discharge trends
2. One machine implements two technologies, namely simultaneously using AE (ultrasonic sensor) and HFCT (radio frequency current sensor)
3. The detection sensitivity of the ultrasonic partial discharge sensor is 10pC, and the sensitivity of the high-frequency CT partial discharge sensor is 5pC
4. Testing software can perform waveform measurement, analysis, display, and fault location on PD signals
5. Reliable prevention of catastrophic failures caused by internal insulation defects in transformers, GIS, cables, and circuit breakers
6. Convenient on-site use: there are two options for users to choose from: portable and rack mounted, and the instrument has self checking function.
Ⅲ.Online monitoring device for grounding current of transformer core.
This product uses RS485, which follows the MODBUS-RTU protocol, as the communication interface to facilitate communication with the Integrated State Monitoring Unit (IED). It has high measurement accuracy, large current measurement range, local storage, and flexible configuration of communication parameters in the measurement of iron core grounding current, meeting the requirements of the State Grid Corporation of China's online monitoring guidelines and the needs of the construction of an intelligent substation online monitoring system. Widely applicable for online monitoring of grounding current in iron cores/clamps of electrical equipment such as transformers and reactors.
Product features:
1. Real time monitoring of iron core grounding current
Support local and remote data monitoring and real-time display of grounding current measurement results for iron cores/clamps;
2. Iron core grounding current exceeding limit alarm
Users can set the grounding current alarm threshold for iron cores and clamps. When the current exceeds the limit, the device will display alarm information and have the function of remote transmission of alarm information;
3. Historical data storage and query functions
The device can continuously store the grounding current data of the iron core for more than five years, and the data will not be lost upon power failure. Historical data and alarm information in the device memory can be queried;
4. The working parameters of the device can be configured flexibly through the MODBUS-RTU communication protocol:
* Alarm threshold * Device clock time * Communication parameters (Baud rate parity stop bit)
* Sampling time interval * Data reading mode (real-time data/historical data)
Communication address
Main technical indicators:
● Working voltage: 12VDC~24VDC;
Communication interface: RS-485
Grounding current alarm value: default alarm value of 100mA (alarm value can be set), automatic alarm when exceeding the limit
Measurement accuracy: 0mA~10mA ≤ ± 5% 10mA~10A ≤ ± 1%
Measuring current range: 0mA~10A
● Shell protection level: IP65
Working environment temperature: -40 ° C~+70 ° C
● Working environment humidity: ≤ 95%
Minimum sampling period: 1s (user can set the sampling period)
External dimensions: long × wide × High/230 × one hundred × 110 (mm)
Ⅳ. Sonar monitor
Product features:
1. Detect gas leakage
2. Detect partial discharge of electrical equipment cables
3. Loosening of screw components in detection equipment
Ⅴ.Cable online monitoring device
1. Monitor the operating temperature, voltage, and current environment of the cable.
2. Monitor the partial discharge points and discharge frequency of cables, and propose predictive cable accident points.
3. Report the location of the cable fault as soon as possible and accurately identify the accident point.
Welcome domestic power stations, new energy wind power, and photovoltaic stations to consult with our company. Our company will sincerely provide you with solutions in various situations to reduce faults and increase profits.
