{"id":1840,"date":"2026-07-03T11:56:38","date_gmt":"2026-07-03T03:56:38","guid":{"rendered":"https:\/\/cnbygele.com\/?p=1840"},"modified":"2026-07-08T12:01:50","modified_gmt":"2026-07-08T04:01:50","slug":"static-var-generator-svg-capacity-selection-and-technical-parameter-guide","status":"publish","type":"post","link":"https:\/\/cnbygele.com\/th\/blog\/static-var-generator-svg-capacity-selection-and-technical-parameter-guide\/","title":{"rendered":"Static Var Generator (SVG) Capacity Selection and Technical Parameter Guide"},"content":{"rendered":"
Document Type: Technical Specification Manual<\/p>\n
This guide explains the capacity selection, site survey requirements, calculation methods, multi-module parallel operation, CT configuration, and engineering implementation standards for a Static Var Generator SVG<\/a>. It is suitable for industrial power quality management projects, distribution system optimization, and reactive power compensation applications.<\/header>\n
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1. Introduction to Static Var Generator SVG Selection<\/h2>\n

A Static Var Generator SVG is a core device in modern power quality management. The accuracy of SVG capacity selection directly affects the power factor compliance rate of the distribution system, the return on investment cycle, and the long-term service life of the equipment.SVG capacity selection should not blindly pursue a larger capacity. Instead, it should be scientifically calculated according to accurate on-site power quality data, load characteristics, and the expected compensation target.<\/p>\n

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If the selected SVG capacity is too small, the equipment may operate at full load or overload for a long time and fail to meet utility power factor requirements, such as 0.95 or 0.98. If the selected capacity is too large, it may lead to unnecessary investment and hardware cost waste.<\/p>\n

\"SVG-reactive-power-compensators\"<\/p>\n<\/div>\n<\/section>\n

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2. Site Survey and Core Parameter Collection Requirements<\/h2>\n

Before selecting the capacity of a Static Var Generator SVG, key electrical parameters must be obtained through on-site inspection, drawing review, multifunction meter reading, or power quality analyzer testing.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u0e1e\u0e32\u0e23\u0e32\u0e21\u0e34\u0e40\u0e15\u0e2d\u0e23\u0e4c<\/th>\nCommon Unit<\/th>\nSource \/ Measurement Method<\/th>\nTechnical Purpose<\/th>\n<\/tr>\n<\/thead>\n
Transformer Capacity ST<\/sub><\/td>\nkVA<\/td>\nTransformer nameplate or distribution system single-line diagram<\/td>\nUsed as the basic reference for evaluating total system load capacity and empirical estimation<\/td>\n<\/tr>\n
Actual Active Power P<\/td>\nkW<\/td>\nOn-site multifunction meter or power quality analyzer<\/td>\nThe key reference data for calculating the actual reactive power gap<\/td>\n<\/tr>\n
Original Power Factor cos\u03c61<\/sub><\/td>\n–<\/td>\nHistorical electricity bills, real-time meter data, or historical records<\/td>\nRepresents the natural power factor before reactive power compensation<\/td>\n<\/tr>\n
Target Power Factor cos\u03c62<\/sub><\/td>\n–<\/td>\nSet according to local utility standards or customer requirements<\/td>\nUsually set between 0.95 and 0.99 to determine the target compensation angle<\/td>\n<\/tr>\n
Total Harmonic Current Distortion THDi<\/td>\n%<\/td>\nMeasured on the main load side using a power quality analyzer<\/td>\nUsed to determine whether serious nonlinear loads exist and whether harmonic capacity margin is required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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3. Static Var Generator SVG Capacity Calculation Methods<\/h2>\n

3.1 Accurate Formula Calculation Method<\/h3>\n

When the actual active power and power factor data are available on site, the trigonometric formula method should be prioritized to accurately calculate the required reactive power compensation capacity.<\/p>\n

Calculation Formula:<\/strong>Qc = P \u00d7 (tan\u03c61 – tan\u03c62)<\/span><\/div>\n

Where:<\/p>\n