Name: High voltage diesel generator sets
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High voltage diesel generator sets

◆ Environmental protection and safety upgrade: Emissions meet National VI/EU standards, standard sound insulation and explosion-proof design, comprehensive safety protection

◆ Advantages of high-voltage transmission: Output voltage ≥ 10kV, reducing long-distance transmission losses, can directly drive high-power equipment, and simplify the distribution system

◆ Intelligent and flexible configuration: integrated PLC control module, supports remote monitoring and multi-machine parallel connection, single machine capacity covers 500kVA-50MVA

◆ High efficiency and durability: Adopting technologies such as high-pressure common rail, the combustion efficiency is improved by 15%-20%, and the fuel consumption is low; high-strength components make the overhaul period reach 15,000-20,000 hours

Crew Introduction

Product Parameters

Case Scene

Options

1. Analysis and comparison of high-pressure diesel generator sets and low-pressure diesel generator sets

Serial Number	Features	Low pressure unit	High pressure unit
1	capacity	Multiple units can be operated in parallel	Multiple units can be operated in parallel, and the machine room can be built in a centralized manner
2	Conveying distance	Short distance power transmission	Can transmit electricity over long distances
3	Loss	In power transmission and distribution, line losses are large	The line loss in power transmission and distribution is small, and there is no problem of transmission heating.
4	Cost	The initial investment of the equipment is small, the maintenance cost is low, and it has great advantages in low capacity and short distance. When used in high capacity and long distance, the cost will be much higher than that of high-pressure units.	The initial investment of the equipment is large, but the maintenance cost is low. It has obvious advantages for large-capacity and long-distance power transmission and distribution, and the supporting investment cost is low.
5	Operation and maintenance	The operation is relatively simple and has low requirements on operators	The operation is relatively complicated and requires high requirements on operators, who must possess the corresponding high-voltage operation certificate to operate it.
6	Configuration	Configuration is relatively simple	The configuration is relatively complex, especially in terms of generators and output distribution cabinets.
7	Safety	High safety performance, mature technology, and low technical threshold	The safety performance is high, the technology is relatively mature, and the technical threshold is high.
8	Development trend	The low-power segment maintains the traditional market, while the high-power segment has the tendency to be replaced by the high-voltage system.	The use of high-pressure systems is the current global trend, and the demand is gradually increasing.

2. Relationship between power, voltage and current

P=1.732×U×I×COSΦ
Take a 2000kW unit as an example, power factor 0.8, frequency 50Hz low voltage (400V)
The current is: I = P / (1.732 × U × COSΦ) = 2000 × 103 / (1.732 × 400 × 0.8) = 3609A
High voltage (10.5KV)
The current is: I = P / (1.732 × U × COSΦ) = 2000 × 103 / (1.732 × 10.5 × 103 × 0.8) = 137A. The high-voltage transmission current is equivalent to 1/26 of the low-voltage transmission current.

3. Application of high voltage diesel generator sets

According to the application characteristics of the above-mentioned high and low voltage diesel generator sets, in applications with large capacity requirements and long power transmission distances, high-voltage diesel generator sets have obvious advantages such as large capacity, long-distance power supply, centralized construction of computer rooms, strong reliability, and simple supporting power distribution systems. They are an inevitable trend in the selection and application of large-capacity units. High-voltage diesel generator sets have been widely used in banks, data centers, metallurgy, civil aviation and other fields.
The main voltage levels of 50Hz high-voltage diesel generator sets are: 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV, 11kV, etc. The power of a single unit is generally above 1000kW, and multiple units are used in parallel.

4. Structural characteristics of high-voltage diesel generator sets

Serial Number	Device name	Instructions for use	Remark
1	Engine	Generally, the power of a single unit is required to be above 1000KW, and engines such as Cummins and MTU can be selected	No difference from low pressure units
2	Dynamo	Short distance power transmission	There is a big difference from the low-voltage generator
3	Connection method	According to different voltage levels, you can choose generators from brands such as STAMFORD and Kangfu	Shock-absorbing pads installed under the base
4	Parallel control system	The double-bearing generator coupling connection is reliable and safer	There is no obvious difference from the low-voltage parallel control system, and differential protection is added
5	High voltage switch cabinet	Generally includes main controller, synchronization device, etc. COMAP main control system, CUMMINS， CAT, MTU parallel control system, differential protection
6	PT cabinet	The general parallel output switch adopts withdrawable electric vacuum circuit breaker, comprehensive protection system, DC operation