Power Harmonics Tester

1. Overview

With the rapid development of China's national economy, the power load has surged dramatically, particularly due to the continuous growth of impulse and non-linear load capacities, leading to waveform distortion and unbalanced three-phase power quality issues in the power grid. Our company's newly launched Power Harmonics Tester is a high-performance multifunctional harmonic tester. Equipped with a DSP+ARM+CPLD core, a 2-inch large LCD display (320×240 pixel matrix), it offers a more compact structure, enhanced functionality, and convenient operation. The backend management and analysis software is rich in features and user-friendly.

2. Main Applications

1. Analyzing the AC power quality supplied to the end-users by the public power grid, including measurements for frequency deviation, voltage deviation, permissible unbalance degree of three-phase voltage, and power grid harmonics.

2 Apply wavelet transform for measurement and analysis of harmonic in non-stationary time-varying signals.

Analyze the power quality of the public power grid under various operating conditions for various electrical equipment.

3 Load Fluctuation Monitoring: Timely records and stores the trend changes of electrical parameters such as voltage, current, active power, reactive power, apparent power, frequency, and phase.

4 Dynamic surveillance of power equipment adjustments and operational processes helps users solve issues that arise during the adjustment and commissioning of power equipment.

We test and analyze the causes of faults in power systems, such as circuit breaker operation, transformer overheating, motor burnout, and erroneous operation of automatic devices.

6 Tested and analyzed the dynamic parameters of reactive power compensation and filtering devices in power systems, and made a quantitative evaluation of their functions and technical specifications.

The 7 features, including portability, multi-parameter capabilities, large capacity, high precision, and the application of modern signal analysis theory, make it widely applicable in fields such as power transmission and distribution, power electronics, and motor driving.

3. Key Features and Capabilities

1. Safe and Reliable

The voltage input utilizes a high-voltage isolation module (2000V, response time ≤ 2μS), while the current input employs a current clamp (0-50KHz, 0-5Arms) to safely isolate the input signal from the measurement system. This design not only ensures safety, reliability, and convenience in use but also significantly enhances the anti-interference capability.

User-friendly

Portable structure, compact and lightweight, allowing one person to carry the instrument to the site for testing; built-in high-performance lithium battery, no need for external power supply.

High precision

Harmonic meets the national standard A-grade instrument requirements. Harmonics and three-phase unbalance are both calculated using a benchmark algorithm, with no approximate calculations. It employs high-precision A/D conversion (16-bit) and simultaneous sampling at a rate of 18 kHz.

4 Strong Software Features

Utilizing a DSP+ARM+CPLD core, the processing speed is rapid, the software features are comprehensive, and it is suitable for complex testing and data processing tasks, significantly enhancing testing efficiency and capabilities.

5 test parameters

All parameters stipulated by the five national standards for electrical energy quality, including system frequency, grid harmonics, degree of unbalance of three-phase voltage, voltage deviation, fundamental wave RMS and true RMS values of voltage and current, fundamental wave active power, active power, fundamental wave apparent power, and 2-63rd harmonics, true power factor.