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SVG High Voltage Static Var Generator

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The fundamental principle of the KS series high‑voltage static var generators from Konstanz is to connect a self‑commutated bridge circuit in parallel with the power grid via an reactor. By appropriately adjusting the phase and magnitude of the AC‑side output voltage of the bridge circuit, or by directly controlling its AC‑side current, the circuit can either absorb or inject the required reactive current, thereby achieving dynamic reactive power compensation.

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Filtering device

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400-0571-505

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Detailed introduction

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Product Overview

The high-voltage static var generator (SVG) is a device specifically designed to provide dynamic reactive power compensation using self-commutated power semiconductor bridge converters. To date, the SVG represents the most advanced static reactive power compensation equipment in the world.

The fundamental principle of the KS series high-voltage static var generators is to connect a self-commutated bridge circuit in parallel with the power grid via an reactor. By appropriately adjusting the phase and magnitude of the AC-side output voltage of the bridge circuit, or by directly controlling its AC-side current, the circuit can absorb or inject reactive current to meet specified requirements, thereby achieving dynamic reactive power compensation.

Product Model

Main Features

The KS series high-voltage HSVG represents the latest technology in the field of reactive power compensation. Connected in parallel with the power grid, the KS‑HSVG functions as a variable reactive current source, rapidly tracking changes in the load’s reactive current and automatically compensating the system’s required reactive power. Its main functions are as follows:

● Enhance the stability of power transmission on the line
● Harmonic dynamic compensation to improve power quality
● Maintain the receiving-end voltage and enhance system voltage stability.
● Suppresses voltage fluctuations and flicker;
● Compensate the system’s reactive power and improve the power factor.
● Suppresses three-phase imbalance

Technical Specifications

Rated voltage	6, 10, 20, 35 kV (special voltages available upon request)
Rated frequency	50 Hz, 60 Hz
Compensation method	Chopper, boost converter
Single set capacity	300–640,000 kvar
Installation position	Indoor, outdoor
Cooling mode	Air-cooled, water-cooled
Response speed	<5ms
Altitude	2,000 meters; custom options available for distances over 2,000 meters.
Service life	More than 30 years
Executive standards	DL/T 1216-2013

KS Series High-Voltage HSVG
Four primary operating modes: constant reactive power at the device, constant power factor at the metering point, constant reactive power at the metering point, and constant voltage at the metering point.
Two layout options: indoor cabinet type and outdoor pad-mounted transformer type.
Two grid-connection modes: direct‑connection type at 6 kV, 10 kV, and 35 kV; step‑down type at 6 kV, 10 kV, 35 kV, and 66 kV.

Technical Features

The KS-HSVG is a compensation device based on a voltage-source converter, marking a qualitative leap in reactive power compensation. It no longer relies on large-capacity capacitors or inductors; instead, it achieves reactive power conversion through the high-frequency switching of high-power power electronic devices (IGBTs). Compared with conventional reactive power compensation equipment, the KS-HSVG exhibits the following characteristics:

● Faster response time, within 5 ms
● Diverse compensation functions, including reactive power compensation, harmonic compensation, negative-sequence compensation, and comprehensive compensation.
● Enhanced voltage flicker suppression capability, exceeding 80%
● Wider operating range, from -100% to +100% of rated capacity
● Extremely low harmonic content—virtually no harmonics—and also provides filtering.
● Small footprint, minimal on-site construction workload

Topological structure

The KS series chain‑type high‑voltage HSVG employs an in‑phase series connection of power units, with each unit adopting an H‑bridge topology, ensuring robust and reliable performance. When a power unit fails, it can be seamlessly bypassed via the host controller’s parameter settings, allowing the entire system to continue operating normally. This design significantly enhances the reliability, flexibility, and maintainability of the high‑voltage static var generator.

KS-HSVG Operating Modes and Compensation Characteristics

Cabinet Body and Components

The KS-series chain-type high-voltage HSVG consists of a start-up cabinet, a power cabinet, and a control cabinet.

Standard dimensions of the KS series 10 kV high-voltage SVG cabinet unit
Capacity (C)/Mvar	1–4	5 to 6	7~8	9~10 (Magic Resistance)	11~12 (Magic Resistance)
Width (W)/mm	3800	4100	5100	5000	5000
Height (H)/mm			2400
Depth (D)/mm			1400

The top-mounted cooling fan of the cabinet has been raised by 500 mm.

Primary System Diagram of the Product

Quick Selection Guide

Direct-hanging type

Direct-Connection KS-HSVG Selection Chart
System voltage	Specification Model	Rated capacity
6kV	KS-HSVG-6/1000	1000
	KS-HSVG-6/5000	5000
	KS-HSVG-6/10000	10000
	KS-HSVG-10/1000	1000
10kV	KS-HSVG-10/5000	5000
	KS-HSVG-10/10000	10000
	KS-HSVG-10/15000	15000
	KS-HSVG-35/1000	1000
35kV	KS-HSVG-35/5000	5000
	KS-HSVG-35/10000	10000
	KS-HSVG-35/15000	15000

Step-Down Type KS-HSVG Selection Table
System voltage	Specification Model	Rated capacity
6kV	KS-HSVG-B5/200	200
	KS-HSVG-Bo/800	800
	KS-HSVG-B6/2500	2500
10kV	KS-HSVG-B10/200	200
	KS-HSVG-B10/500	500
	KS-HSVG-B10/1000	1000
	KS-HSVG-B10/2500	2500
35kV	KS-HSVG-B35/1000	1000
	KS-HSVG-B35/5000	5000
	KS-HSVG-B35/10000	10000
	KS-HSVG-B35/15000	15000
66kV	KS-HSVG-B66/1000	1000
	KS-HSVG-B66/5000	5000
	KS-HSVG-B66/10000	10000
	KS-HSVG-B66/15000	15000

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