Réponse I.Core
The configuration of Huaquan parallel generator sets primarily involves five steps: déterminer le nombre d'unités parallèles, sélection d'un module de contrôle parallèle, concevoir un système d'armoires parallèles, configuration d'un système de répartition de charge, et définir des stratégies opérationnelles. The core of the parallel configuration lies in the adoption of an automatic parallel cabinet (automatic synchronizing device) to achieve automatic synchronization of voltage, fréquence, and phase among multiple units, as well as automatic load distribution.
Puissance Huaquan provides a full range of parallel configuration solutions, allant de 2 à 6 or more units, from low voltage to high voltage (10.5kV), and from hundreds of kilowatts to several megawatts. Below is a detailed configuration guide.
II.Core control module of parallel configuration
The core of Huaquan’s parallel system lies in the parallel control module. Based on project requirements and budget, Huaquan offers multiple levels of parallel configurations:
| configuration level | control module | Price markup reference | Features | Scénarios applicables |
| Manual parallel connection | Simple synchronization device | About +1000 yuan | Manual closing of the synchronous indicator through manual observation requires skilled operators | Temporary electricity usage, limited budget, and personnel on duty |
| Automatic parallel connection | Zhongzhi 9510 / Deep Sea | About +10,000 yuan | Automatic synchronization, automatic switching on, automatic load distribution, basic protection | Small and medium-sized factories, industrial parks, et alimentation de secours sources |
| High-end parallel operation | ComAp | Inquiry and customization | Full-function parallel operation + AVR coordination + cloud monitoring, ensuring fast automatic parallel operation | Centres de données, hôpitaux, mines, large-scale projects |
| Grid-connected function | Grid-connected controller | About +12,000 yuan | The generator set is connected in parallel with the utility grid, allowing it to supply power to the grid | Surplus power grid-connected, peaking power station |
Huaquan Power vous rappelle that automatic parallel connection has been verified in numerous projects, featuring fast speed and high reliability. It is recommended to prioritize the automatic parallel connection solution.
III. Parallel system configuration scheme
Option 1: Three-in-one parallel connection (1200kW system)
Cas: Three 400kW generator sets are connected in parallel, with a total output of 1200kW, and equipped with a 9510 parallel operation cabinet.
| configuration item | Specification |
| single-unit power | 400kW × 3 unités |
| Total output power | 1200kW |
| Parallel cabinet | 9510 Parallel operation control module |
| moteur | In-line 6-cylinder engine, 1500tr/min, compression ratio 17:1 |
| générateur | Huaquan all-copper motor |
| structure | Ultra-quiet soundproof box |
| réservoir à carburant | Extra-large base fuel tank, 1400L (long endurance) |
| thermal design | The area of the air inlet and outlet is increased, ensuring smooth heat dissipation |
Characteristics of Huaquan: It adopts a gantry-style steel structure, providing stronger load-bearing capacity; the soundproof enclosure design ensures quieter operation.
Option 2: Six-unit parallel high-voltage system (2400kW+)
Cas: A mining company in Heilongjiang utilizes Huaquan 2400kW high-voltage parallel generator sets equipped with 9510 parallel control modules.
| configuration item | Specification |
| Number of units | Multiple units connected in parallel (specific configuration according to actual needs) |
| Total output power | 2400kW+ |
| voltage level | High voltage (10.5kV) |
| Parallel operation module | 9510 Parallel Control Module |
| moteur | V-type 12-cylinder, turbocharged and intercooled electronically controlled high-pressure common rail, conforme aux normes d'émission de Chine III |
| générateur | English generator |
| launch configuration | 2 turbocompresseurs, 2 intake air filters, 2 starter motors |
| intelligent system | Huaquan Cloud Intelligent Monitoring System |
| Low-temperature startup | Forced water jacket heater |
Features:
- Multi-platform remote operation and maintenance, real-time monitoring, intelligent reminders, and automatic maintenance
- Stable power supply, strong harmonic suppression capability, and high voltage regulation accuracy
- Short warm-up time and fast start-up speed
Option 3: Four-unit parallel gas-fired shelter power station (1000kW)
Cas: Four 250kW gas-fired generator sets are paralleled to form a containerized shelter power station.
| configuration item | Specification |
| single-unit power | 250kW × 4 unités (single unit rated at 281kW) |
| Total output power | 1000kW |
| Overall dimensions | 10m × 2.9m × 2.2m |
| Engine technology | In-line 6-cylinder, 4-valve, 4-stroke, water-cooled, turbocharged with intercooling, electronically controlled lean burn |
| Single-unit displacement | 12.84L |
| générateur | Fully copper brushless, with AVR, IP21, H-grade insulation |
| Parallel operation module | ComAp parallel operation module |
| Parallel cabinet configuration | 2 parallel cabinets + 1 output cabinet |
| Work logic | Utility power failure → automatically start 2 or more units → parallel operation for power supply → utility power restoration → automatically disconnect and shut down |
| Box function | Noise reduction, sun protection, and aesthetics |
Huaquan’s advantage: It adopts Kemai parallel operation module, which ensures fast automatic parallel operation and stable operation.
IV.Seven core functions of parallel operation
According to the design of the Huaquan power parallel system, the automatic parallel cabinet typically possesses the following functions:
- Improve the reliability and continuity of power supply
Multiple units are connected in parallel to form a power grid, ensuring stable supply voltage and frequency, and capable of withstanding the impact of significant load variations. In the event of maintenance or failure of any unit, the remaining units can continue to supply power.
- Automatic load distribution
When multiple units are operating in parallel, the load distribution difference is less than 5%, ensuring that each unit operates under reasonable conditions.
- Economical operation
Based on the load size, an appropriate number of units will be automatically activated. This can reduce fuel waste caused by high-power units operating at low loads.
- Flexible expansion
Only install equipment with the current required power. When there is a need to expand the grid capacity in the future, add more generator sets and easily integrate them into the system.
- Multiple operation modes
- Power on as per demand: The unit with the highest priority is powered on first. When the load exceeds the set value, the unit with the second-highest priority is powered on and connected in parallel
- Full startup: All units are started simultaneously, with the unit meeting the conditions first being switched on first
- Balanced operation time: Scheduling based on cumulative operation time to extend the overall lifespan of the unit
- Use in combination with ATS
When the grid power is normal, the load is supplied by the grid power; when the grid power fails, the unit automatically starts and is put into operation. After the grid power is restored, it automatically switches back to the grid power, and the unit delays the shutdown.
- Comprehensive protection functions
It features reverse power protection, overcurrent protection, short circuit protection, mechanical fault indication, and protection functions.
V.Configuration operation process
- Commissioning of a single unit (preparation before parallel operation)
Before the parallel system is put into operation, Huaquan Power needs to complete the following debugging tasks:
| step | content |
| 1 | Check the controller parameter configuration |
| 2 | Check the MSC CAN connection between units (multi-unit communication) |
| 3 | Start the machine manually and check the data of the engine and generator |
| 4 | Test manual closing/opening function |
| 5 | Adjust the power generation frequency to the rated value (50Hz) |
| 6 | Adjust the power generation voltage to the rated value (400V) |
| 7 | Manually power on and load the device, and check the Facteur de puissance, active power, and reactive power parameters |
- No-load manual parallel test
- Manually close the parallel connection and observe whether the synchronous parallel connection is stable
- Check whether the inrush current upon switching on is too high
- Observe whether there is circulation, and whether the active and reactive power outputs are 0
- Manual parallel test with load
- Conduct a load test to observe whether the distribution of active and reactive power is even
- Soft loading/soft unloading test to check for any overshoot
- Fully automatic parallel operation
After setting the automatic mode, the system will automatically complete the startup, paralleling, load distribution, and disconnection shutdown according to the preset strategy.
VI.Configuration requirements for parallel cabinet
- Hardware configuration of parallel cabinet
| component | explication |
| Synchronization control module | Zhongzhi 9510 / Deep Sea DSE / ComAp |
| Automatic closing mechanism | Control the closing/opening of the circuit breaker |
| Load distribution module | Allocate active/reactive load |
| protective relay | Reverse power, surintensité, and short circuit protection |
| communication interface | RS232/485, with 4G/Ethernet options |
| ATS linkage | Used in conjunction with automatic transfer switches |
- Wiring requirements for parallel cabinet
- The cable lengths from each unit to the parallel cabinet should be as equal as possible to avoid circulating currents
- The cable specification is selected based on the rated current of the unit, and it is recommended to increase the specification by one level
- The circuit breaker is a frame-type circuit breaker with three-stage protection function
VII. Suggestions on selection of parallel configuration
| Your request | Recommended Configuration | explication |
| Total power ≤ 500 kW, requiring standby redundancy | Two units are paralleled and automatically connected in parallel (Zhongzhi 9510) | Common +N+1 redundancy scheme |
| Total power: 500-2000 kW | 3-4 units in parallel operation, automatic parallel connection (Zhongzhi/Shenhai) | Flexible capacity expansion, with good economic efficiency |
| Total power of 2000kW+ and high-voltage output | Multiple high-voltage parallel machines, high-end parallel machine module (Comay) | Stable power supply and high voltage regulation accuracy |
| Surplus power grid connection/peak shaving power station | Automatic parallel operation + grid-connected function | Capable of grid connection with the utility grid |
| Gas-fired power station | Comay parallel operation module | Dedicated for gas turbine units, with fast parallel operation speed |
| Mobile/temporary power supply | Manual parallel connection (economic type) | Limited budget, with personnel on duty |
VIII. Common Issues
T1: How many units can be connected in parallel by the Huaquan parallel system at most?
UN: Huaquan Power can customize parallel systems consisting of 2, 3, 4, 6 or even more units according to user needs. Our delivered projects include 3 sets of 400kW parallel machines (total 1200kW), 4 sets of 250kW gas-fired parallel machines (total 1000kW), et 6 sets of 1200kW high-voltage parallel machines.
T2: How to choose between automatic parallel connection and manual parallel connection?
UN: Puissance Huaquan strongly recommends giving priority to automatic parallel connection. Although the price for manual parallel connection is about 1000 yuan higher and the price for automatic parallel connection is about 10000 yuan higher in the mall configuration, automatic parallel connection has the following advantages:
- High closing accuracy, no inrush current
- Automatically distribute load without manual intervention
- Comprehensive protection functions
- It can automatically isolate in case of a fault
T3: What is the load distribution accuracy after parallel connection?
UN: The load distribution difference of the fully automated parallel cabinet from Hua is less than 5%, ensuring reliable operation of each unit.
Q4: Does a parallel system require a separate control cabinet?
UN: Oui, it is necessary. Parallel systems are typically equipped with parallel cabinets, which internally contain synchronous control modules, automatic closing mechanisms, load distribution modules, etc.. Par exemple, a 4-unit gas engine parallel shelter is equipped with 2 parallel cabinets and 1 output cabinet.
📌 Summary: Quick Reference for Huaquan Parallel Configuration
| configuration item | Solution recommandée |
| Preferred parallel operation mode | Automatic parallel connection (high precision, safe and reliable) |
| Recommendation control module | Zhongzhi 9510 (Economy) / Deep Sea DSE (Standard) / Kemai ComAp (High-end) |
| Standard parallel operation specification | 400kW×3, 250kW×4, multiple high-voltage parallel machines |
| Load distribution accuracy | <5% |
| Parallel function | Automatic synchronization, automatic closing, automatic load distribution, and reverse power protection |
| Extended features | ATS linkage and grid-connected function (+12,000 yuan) |
| intelligent monitoring | Huaquan Cloud Intelligent Monitoring System (Remote Operation and Maintenance, Real-time Monitoring) |
Core advantages of Huaquan Power:
- Diverse solutions: allant de 2 à 6 or more units, and from low voltage to high voltage (10.5kV), with a comprehensive range of solutions
- Complete module range: The full series of parallel operation modules from Zhongzhi 9510, Shenhai, and ComAp are available for selection
- Experienced: Successfully delivered parallel operation projects in various scenarios such as mining, marin, and gas shelters
- Deep customization: Support for high-end applications such as combined cooling, heating, and power generation, as well as grid-connected power generation
For detailed parallel system configuration plans or quotations, please contact Huaquan Power’s customer service
