HVPF series High Voltage Harmonic Filter

Product: HVPF series High Voltage Harmonic Filter

Introduction:to effectively filter out high-order harmonics and improve power quality.Model :HVPF

Installation: container, frame type, floor-standing

Brand: Sanhe

Product introduction

Due to advancements in industrial automation, equipment such as rectifiers, frequency converters, electrolytic cells, and electric arc furnaces are widely used in industrial and mining enterprises. These nonlinear loads generate substantial high-order harmonics during operation, which are fed into the power grid, causing waveform distortion, degrading power quality, and jeopardizing the safe operation of other electrical devices in the supply system. This form of "power pollution" not only increases additional losses in transformers, cables, and other power equipment but can also lead to malfunctions in control, protection, and measurement systems, as well as interference with communication and network systems.

HVPF series of high-voltage passive harmonic filters offer the optimal solution for voltage and current distortion. Designed primarily for harmonic suppression while also providing reactive power compensation, this device ensures that both the system's harmonic voltage distortion rate and the harmonic current injected into the grid comply with national standards. Additionally, it improves the power factor, achieving the dual objectives of power quality management and energy conservation.

Feature

✔ Precision Simulation Design – Utilizes system impedance, power, and harmonic parameters for computer-aided simulation to determine the optimal filter branches and capacity.
✔ High-Performance Core Components
- Filter Capacitors: All-film insulation dielectric, featuring compact size, low loss, low temperature rise, and high overload capability.
- Filter Reactors: Single-phase air-core design, with continuously adjustable inductance (±5%) and quiet operation.
- Damping Resistors: Non-inductive or low-inductance design, with step-adjustable resistance to ensure precise tuning accuracy.
✔ Flexible Topology Configuration – Supports single-tuned, double-tuned, and high-pass filter combinations to target high-order harmonics such as the 5th, 7th, and 11th.
✔ "Zero Reactive Power" Filtering Function – Optional parallel reactors to form a high-order LC circuit, achieving highly efficient filtering with near-zero fundamental current.
✔ Full-Protection Safety Design – Equipped with live display and electromagnetic forced interlock for operational safety.
✔ Configurable Structural Forms – Available in frame-type or cabinet-type designs, customizable according to on-site requirements.

Conditions of Use

Execution and Reference Standards

Working principle:

This device comprises a filter circuit with filter capacitors, filter reactors, and non-inductive resistors, connected in parallel with the harmonic source. It creates low-impedance paths for individual harmonics outside the main power grid, effectively diverting most harmonic currents into the filter and reducing grid distortion to a compliant level. At the fundamental frequency (50 Hz), the filter behaves as a capacitor, supplying reactive power to the grid to enhance the power factor and optimize overall performance.

Depending on site conditions, the filtering system can be configured with single-tuned, double-tuned, or high-pass filters, targeting high-frequency harmonics in the network (e.g., 5th, 7th, and 11th orders). Designed with rational topology and reliable operation in mind, the device is also equipped with a comprehensive protection system, ensuring the stable performance of the complete equipment set.

Figure 1 illustrates the harmonic current flow following the formation of a parallel resonant circuit between the capacitor bank and the grid. When the system power factor is low, capacitor banks are typically connected in parallel to provide reactive power compensation. However, if the capacitor bank and the system inductance resonate in parallel at a specific harmonic frequency, this can lead to significant harmonic amplification. As a result, harmonic voltage may exceed permissible levels for the application, contributing to grid pollution, as depicted in Figure 1.

Figure 2 illustrates the harmonic current flow after the installation of the HVPF passive filter device. This filter compensation system is designed and manufactured based on a thorough analysis of the customer's specific on-site conditions. Input data for the design process is obtained from actual field measurements and then incorporated into a computer simulation model. As a result, the filtering performance is highly effective: the majority of harmonic currents are diverted to the filter, while only a minimal portion—complying with relevant standards—flows into the power grid, as shown in Figure 2.

Figure 3 illustrates the system frequency-impedance characteristic curve. Based on the system topology shown in Figure 2, this diagram clearly demonstrates that the impedance values at the 5th, 7th, 11th, and higher harmonic frequencies are significantly low, indicating effective filtering performance.

Main wiring diagram

Model Selection

Filtering & Compensation Performance

l Harmonic filtering complies with the national standard GB/T 14549-1993 Power Quality – Harmonics in Public Supply Networks and aligns with the recommended limits of IEEE 519-2014 and the compatibility levels specified in IEC 61000-2 series.

l Reactive power compensation raises the power factor to ≥0.95, reducing electricity costs.

l Decreases losses in transformers and lines, enhances transmission capacity, and extends the service life of electrical control equipment.

Technical Services

l On-site harmonic detection, analysis, and test report provision.

l Proposal of tailored solutions based on field conditions.

l Determination and optimization of harmonic control schemes.

l Testing, assessment, and adjustment of reactive power compensation plans.

Ordering Information Required