Acrel Hydroelectric Power Plant Measurement System

Measuring device is an important part of the operation monitoring of the hydroelectric power plant.The measurement of the hydroelectric power plant is mainly divided into electrical quantity measurement and non-electric quantity measurement.Electrical measurement refers to the measurement of electrical real-time parameters by means of electricity, including current, voltage, frequency, power factor, active/reactive power, active/reactive energy, etc.; non-electricity measurement refers to the use of transmitters to convert non-electricity Measure 4-20mA or 0-5V electrical signals, including temperature, speed, pressure, liquid level, opening, etc.This essay only discusses the measuring device and power consumption management system of the hydroelectric power plant according to the standard, and does not involve the microcomputer protection configuration of the hydroelectric power plant.

1.0.1 This specification is formulated to standardize the configuration design of measuring devices in hydroelectric power plants, ensure the long-term, safe and stable operation of hydroelectric power plants, and improve the overall comprehensive economic benefits of hydroelectric power plants.
1.0.2 This specification is applicable to the configuration design of measuring devices for newly built, rebuilt and expanded hydroelectric power plants.
1.0.3 The configuration design of measuring devices in hydroelectric power plants should actively adopt new technologies and products that have passed the appraisal.
1.0.4 The configuration and design of measuring devices in hydroelectric power plants should meet the requirements of the power system for the amount of information collected at the power station and the method of information collection.
1.0.5 The configuration design of measuring devices in hydroelectric power plants shall not only conform to this code, but also comply with the current relevant national standards.

2.0.1 Electrical measuring
Measurement of electrical real-time parameters by means of electricity.
2.0.2 Energy metering
Measurement of electric energy parameters.
2.0.3 General electrical measuring meter
Hydroelectric power plants often use pointer meter, digital meter and so on.
2.0.4 Pointer-type meter
According to the relationship between the pointer and the scale to indicate the measured value of the meter.
2.0.5 Digital-type meter
In the display can use digital directly show the measured value of the meter.
2.0.6 Watt-hour meter
An instrument that measures active and/or reactive electrical energy data.
2.0.7 Intelligent AC sampling device
AC frequency power sampling, directly to the data processing unit for processing to get the voltage, current, active power, reactive power, power factor, frequency, active power, reactive power and other parameters, and through the standard communication interface output multi-functional intelligent meter.
2.0.8 Transducer
Be measured by the conversion of DC current, DC voltage or digital signal device.
2.0.9 Measuring instrument accuracy class
Measuring instruments and/or accessories to meet certain measurement requirements designed to ensure that the permissible error and change extremely within the specified limits of the level.
2.0.10 Automation components
Components and/or devices for condition data monitoring, action execution in hydroelectric plants.
2.0.11 Non-electricity measuring
Measurement of temperature, pressure, speed, displacement, flow, level, vibration, pendulum and other non-electricity real-time parameters.

Electrical measurement objects include hydro generator/generator motor, main transformer, line, bus, plant transformer, DC system and so on.Figure 1 is a schematic diagram of the electrical wiring of the hydroelectric power plant, showing the electrical wiring of the hydroelectric generator set, main transformer, line, and plant power transformer.

3.1 Electrical measurement and electric energy metering of hydroelectric generator/generator motor.

3.2 Electrical measurement and electric energy metering of boosting and sending system

3.3 Electrical measurement and energy metering of plant power system

3.4 Electrical measurement of DC power system

3.5 Uninterruptible Power System (UPS) Electrical Measurements

3.6 Commonly measured electrical measuring instruments and electric energy measuring instruments

3.7 Electrical measurement and electric energy metering secondary wiring

Acrel-3000 power management system for hydroelectric power stations is aimed at hydroelectric generator sets, step-up transformers, outlet circuits, factory transformers and low-voltage parts of factory power, DC screens and batteries of DC systems, and local control units (LCUs) in hydroelectric power stations. Centralized monitoring of the electrical and non-electrical parameters of the power station can also be connected to the protection measurement and control unit in the station to realize power generation and power consumption monitoring, equipment management and operation and maintenance management of the power station.

(1) Plant overview and one-line diagram display

(2) Generator, Transformer Condition Monitoring

(3) Data Query

(4) Sequence of Events Recording

(5) Control and regulation

(6) Abnormal alarm

(7) Statistics and Tabulation

(8) Device management and operation and maintenance management

In addition, the system also has functions such as battery monitoring, video monitoring, user reports, and document management.It can display the operating status of each area in the power station in real time through single-line diagrams, pie charts, bar graphs, 3D graphics, and mobile APPs, so that managers can keep abreast of the power station operating conditions.

The configuration of the measuring instruments of the hydroelectric power station and the design purpose of the power management system of the plant are all aimed at meeting the needs of the safe and economical operation of the hydroelectric power plant and the commercial operation of electric power, ensuring accuracy and reliability, advanced technology, convenient monitoring, and economical application.

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