Power Transformer

230kv Oil-immersed Power Transformer

Brand: HENGFENGYOU
Series: SSZ
USES: Power Transformer
Country of origin: China
Terms of payment: L/C, T/T, Western Union, Paypal, Money Gram
Certification: ISO9001、CB

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230kv Power Transformer Overview

● scientific calculation means: use advanced electrical, magnetic, thermal and mechanical force calculation software to calculate the distribution of electromagnetic field and magnetic leakage, conduct wave process analysis, and select reliable insulation margin to ensure reliable product performance.

● reasonable structural layout: the iron core adopts multi-stage step lap full tilt structure to reduce no-load loss and noise; The iron core is supported by a round rod, and the coil adopts a hard paper cylinder to enhance the short-circuit resistance; The coil adopts baffle to guide and circulate the oil flow and reduce the coil temperature rise; Special shaped fins are used to raise the fin heat dissipation center to reduce the temperature rise of the oil surface: all internal insulating parts and metal structural parts are rounded to reduce partial discharge.

● advanced process measures: the iron core is automatically cut, with high precision and small burr. The process of not stacking iron rollers is adopted, and the surface is coated with double h curing adhesive and bound; Vertical winding of coil, with numerical control tensioning device; The body adopts the phase suit process, and the lead wire adopts the overall preassembly; The body adopts the fully automatic kerosene gas-phase drying process.

● perfect quality assurance system: control product quality in strict accordance with ISO19001 quality system.

● ssz11-240000/230 transformer has passed the national full set type test and sudden short circuit test.

● products of other voltage combinations, loss values, connection groups and capacities listed in the table can be provided according to user needs.

230kv power transformer manufacturer
200MVA-230kv Power Transformer

230kv Power Transformer Advantage

1. Standards: GB, IEC, GOST, EN, NF, ANSI/IEEE (customizable according to customer standards)

2. Certification: ISO、CE、IEC、SABS、COC、CSA、UL

3. Efficiency: The efficiency of a 132kV transformer can exceed 98%, meeting energy efficiency regulations in all countries worldwide.

4. Successful case verification: Accumulated a large amount of 230kV project experience in global power grid transformation, new energy access (such as photovoltaic booster stations) and other fields, verified the stability of products under complex working conditions, and designed a lifespan of over 30 years.

5. Environmental Protection and Sustainable Development: Adopting FR3 environmentally friendly insulation oil and recyclable materials to reduce carbon footprint, in line with the "dual carbon" policy orientation.

6. Delivery capability: Normal 90 days; The shortest delivery cycle is 50 days.

230kv Power Transformer Type

For HENGFENGYOU ELECTRIC, a 230kV transformer can be a three-phase double winding transformer, a three-phase three winding transformer, or an autotransformer transformer. These types of transformers have the same principle, but their structures are different, and different types of transformers have different applications. HENGFENGYOU ELECTRIC provides you with the most ideal solution.

230kV three-phase double winding transformer

230kV three-phase three winding transformer

230kV autotransformer transformer

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230kv Power Transformer Technical Parameter

230kV double winding non excitation voltage regulating power transformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range (kv)		联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	低压 LV	联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
31500	220 242±2×2.5%	6.3 6.6 10.5 11	YNd11	35	135	12-14	0.70
40000				41	157		0.70
50000				49	189		0.65
63000				58	220		0.65
75000		10.5 11 13.8		67	250		0.60
90000				77	288		0.55
120000				94	345		0.55
150000		11;13.8; 15.75;20		112	405		0.50
180000				128	459		0.46
240000				160	567		0.42
300000		15.75; 18;20		189	675		0.38
360000		15.75; 18;20		217	774		0.38

Low voltage 66kV level 230kV double winding non excitation voltage regulating power transformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range (kv)		联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	低压 LV	联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
31500	220 242±2×2.5%	63 66 69	YNd11	38	151	12-14	0.89
40000				45	176		0.89
50000				53	211		0.82
63000				63	247		0.82
90000				83	323		0.75
120000				102	387		0.75
150000				122	453		0.68
180000				138	513		0.68
240000				171	635		0.61

230kV dual winding on load voltage regulating power transformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range (kv)		联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	低压 LV	联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
31500	220 242±2×2.5%	66.3;6.6 10.5;11 35;37;38.5	YNd11	38	135	12-14	0.70
40000				45	157		0.63
50000				54	189		0.56
63000				63	220		0.56
90000		10.5;11 35;37;38.5		80	288		0.49
120000				99	346		0.49
150000				116	405		0.42
180000				135	468		0.42
120000		66 69		102	355		0.49
150000				120	415		0.42
180000				140	475		0.42

230kV Three winding Unexcited Voltage Regulating Power Transformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range(kv)			联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)		空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	中压 MV	低压 LV	联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	升压变 step-up	降压变 step-down	空载电流 No-load current (%)
31500	220 242±2×2.5%	69 115 121	6.3 6.6 10.5 11 35 37 38.5	YNyn0d11	40	162	高-中 H-M 22-24 高-低 H-L 12-14 中-低 M-L 7-9	高-中 H-M 22-24 高-低 H-L 12-14 中-低 M-L 7-9	0.70
40000					48	189			0.63
50000					56	225			0.56
63000					66	261			0.56
90000			10.5 11 13.8 35 37 38.5		86	351			0.49
120000			10.5 11 13.8 35 37 38.5		106	432			0.49
150000			11 13.8 15.75 35 37 38.5		125	513			0.42
180000					142	585			0.42
240000					176	720			0.35
300000					208	750			0.30

230kV three winding non excitation voltage regulating autotransformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range(kv)			联结组 Connection symbol	空载损耗 No-load loss(kw)		负载损耗 Full-load loss(kw)		短路抗阻 Impedance(%)		空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	中压 MV	低压 LV	联结组 Connection symbol	升压 step-up	降压 step-down	升压 step-up	降压 step-down	升压变 step-up	降压变 step-down	空载电流 No-load current (%)
31500	220 242±2×2.5%	115 121	6.6 10.5 11 35 37 38.5	YNyn0d11	25	22	117	99	高-中 H-M 12-14 高-低 H-L 8-12 中-低 M-L 14-18	高-中 H-M 8-12 高-低 H-L 28-34 中-低 M-L 18-24	0.50
40000					29	26	144	121			0.50
50000					34	30	170	144			0.43
63000					40	36	201	171			0.43
90000					50	46	276	234			0.36
120000			10.5 11 13.8 15.75 18 35 37 38.5		62	56	340	288			0.36
150000					70	60	405	342			0.33
180000					80	72	464	387			0.33
240000					95	86	595	504			0.25

230kV three winding on load voltage regulating power transformer
额定容量 Rated capacity (kva)	电压组合及分接范围 Voltage ratio and tap range(kv)			联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
额定容量 Rated capacity (kva)	高压 HV	中压 MV	低压 LV	联结组 Connection symbol	空载损耗 No-load loss (kw)	负载损耗 Full-load loss (kw)	短路抗阻 Impedance(%)	空载电流 No-load current (%)
31500	220 242±2×2.5%	69 115 121	6.3 6.6 10.5 11 35 37 38.5	YNyn0d11	44	162	高-中 H-M 22-24 高-低 H-L 12-14 中-低 M-L 7-9	0.77
40000					50	189		0.70
50000					60	225		0.63
63000					70	261		0.63
90000			10.5 11 35 37 38.5		92	351		0.56
120000					115	432		0.56
150000					135	513		0.49
180000					159	630		0.49
240000					193	780		0.45

230kv Power Transformer Shipment

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230kv Power Transformer FAQ

What is a 230kV power main transformer?

Answer: The 230kV main transformer is a high-voltage power equipment with a rated voltage of 230kV and a capacity of usually 100-400MVA. It is used for voltage conversion in ultra-high voltage power grids (such as 500kV → 230kV → 110kV) and is the core hub equipment of backbone power grids. The core structure includes high-voltage windings, iron cores, cooling systems, and composite insulation sleeves.

What are the main application scenarios of 230kV transformers?

Answer:

*Ultra high voltage transmission network: connects the 500kV ultra-high voltage power grid with the 230kV regional power grid.

*Power plant booster station: Boosting the outlet voltage (such as 24kV) of large thermal/hydroelectric power units to 230kV.

*Hub Substation: Achieve 230kV → 132kV/33kV multi-stage voltage reduction to supply power to cities or industrial areas.

What is the capacity range of a 230kV transformer?

Answer:

*Conventional capacity: 50-200MVA (regional power grid).

*Large capacity customization: 200-400MVA (such as nuclear power, ultra-high voltage supporting substations).

What is the difference between a three winding transformer and an autotransformer?

Type three winding transformer autotransformer

Structure independent high voltage, medium voltage, and low voltage windings. High voltage and medium voltage shared windings (small size, high efficiency)

Application of multi voltage level interconnection (such as 230/132/33kV) for similar voltage conversion (such as 230kV/132kV)

High cost (multiple independent insulation groups) and low cost (material savings of 20% -30%)

How to choose the cooling method for 230kV transformers?

Answer:

*OFAF (forced oil circulation air cooling): below 200MVA, with balanced heat dissipation and controllable cost.

*ODAF (forced oil circulation guided air cooling): 200-500MVA, precise heat dissipation, suitable for high load scenarios.

*OFWF (forced oil circulation water cooling): requires a matching water cooling system, suitable for high temperature or closed environments.

6. Selection suggestions for 230kV transformer tap changer (MR, ABB, domestic)

Brand advantages applicable scenarios

MR (Germany) is a leading technology in the field of ultra-high voltage, with a mechanical lifespan of over 1 million times in harsh scenarios such as nuclear power and ultra-high voltage

ABB (Switzerland) intelligent control, supporting remote monitoring and diagnosis of intelligent substations that require integrated automation systems

China (such as Huaming) has high cost-effectiveness and fast response to localized services for conventional power grids or budget constrained projects

7. Delivery cycle and key influencing factors of 230kV transformer?

*Standard cycle: 4 months (including design, material procurement, production, and type testing).

*Urgent delivery: can be compressed to 2 months (at an additional cost).

*Delay factors:

*The supply cycle of imported high-voltage bushings (such as ABB) is long.

*Complex tests (lightning impulse, temperature rise test, partial discharge test).

8. Design life and measures to extend the life of 230kV transformers

*Theoretical lifespan: 30-40 years (IEC 60076 standard).

*Methods for extending lifespan:

*Control the load rate to ≤ 90% to avoid long-term overload.

*Adopt online monitoring (DGA, temperature, partial discharge).

*Regularly replace the insulation oil (acid value ≤ 0.1mg KOH/g).