Description
Overview of Generator Synchronization Panel
- The generator synchronization panel (also known as a synchronization panel, synchronizing panel, or synchronization control panel) is the core operational, monitoring, and control equipment used in power systems—such as power plants, substations, marine power plants, and isolated power plants—to enable generator units to operate in synchronous parallel with the power grid (or another generator).
Conditions for connecting a generator to the grid for parallel operation
| No. | Parallel Condition | Description |
|---|---|---|
| 1 | Equal Voltage | The amplitude of generator terminal voltage shall be equal to that of power grid (system) voltage or within the allowable deviation range. |
| 2 | Identical Frequency | The frequency of generator shall be consistent with power grid frequency or within the allowable deviation range. |
| 3 | Consistent Phase Sequence | The phase sequence of generator must be strictly identical with that of power grid. This is an absolute prerequisite without any deviation allowed. |
- Of the three conditions mentioned above, phase sequence consistency is a non-negotiable, mandatory requirement; while voltage and frequency deviations are permitted to a certain extent, they must be kept within safe thresholds.
- In the actual grid-synchronization process, voltage, frequency, and phase deviations cannot be absolutely zero.
- The core function of the generator synchronizing panel is to monitor deviations in these three parameters in real time and, when the deviations fall within the permissible range, to issue a closing command safely and accurately, enabling the generating unit to synchronize smoothly with the grid.
Generator synchronizing panel schematic
Steps for automatic synchronization of generator in the control panel
Testing of the Automatic Synchronization Device
| Step | Content |
|---|---|
| a | Power on the device, check self-inspection and initialization status to confirm normal operation. |
| b | Modify setting values according to on-site conditions: switch closing time, allowable frequency difference, allowable voltage difference, frequency regulation control coefficient, voltage regulation control coefficient, single-side no-voltage closing permission, etc. |
| c | Select each synchronization point via selection switch; the device shall display the corresponding synchronization point number. |
| d | Carry out automatic synchronization closing test at any synchronization point to verify whether the device outputs synchronization closing command correctly. |
| e | Apply grid-connected required voltage to system side and standby side respectively, check if the collected and displayed voltage and frequency are consistent with external actual values. |
| f | Keep voltage and frequency of system side stable, change parameters of standby side, and verify correct action of four output relays: speed increase, speed decrease, voltage rise and voltage drop. |
| g | Adjust voltage and frequency of both sides within closing setting range; the device shall send out closing command, the closing indicator light turns on, and the closing contact on terminal block conducts. |
Generator Synchronization Panel and Its System Dynamic Test
| Step | Content | Key Requirements |
|---|---|---|
| a | Manual Synchronous Closing Test | Adjust applied voltage parameters to meet synchronization conditions, operate closing control switch, and ensure circuit breaker closes normally. |
| b | Manual Asynchronous Closing Test | Operate closing switch when parameters fail to meet synchronization conditions; the closing operation shall be blocked to verify the blocking function. |
| c | Automatic Precise Synchronization Closing Test | After parameters meet the requirements, the automatic synchronization device shall output closing command automatically and the circuit breaker closes properly. |
| d | Manual Simulated Grid-connection Test | Open generator outlet isolating switch, build up generator voltage and switch on manual synchronization circuit, adjust voltage and frequency to qualified values then perform manual closing. |
| e | Automatic Simulated Grid-connection Test | Open the isolating switch, establish generator voltage and activate automatic synchronization circuit. The device shall conduct automatic regulation and send closing command once all conditions are satisfied. |
Generator synchronization panel price
- The price of a generator synchronizing panel typically ranges from 30,000 to 50,000 RMB, depending on the specific technical specifications.
Key Technical Specifications
| Parameter | Typical Range / Requirement | Description |
|---|---|---|
| Input Power Supply | AC 85V～250V / DC 100V～250V | Shall match generator output and station DC system |
| Output Power Supply | Matched with generator set control system | Used for excitation control, speed regulation and other functions |
| Allowable Voltage Difference | Generally ≤ ±5%～±10% rated voltage | Closing will be blocked if exceeded |
| Allowable Frequency Difference | Generally ≤ ±0.1～0.5Hz | Closing will be blocked if exceeded |
| Allowable Phase Difference (Closing Angle Difference) | Generally ≤ ±5°～±10° | Closing will be blocked if exceeded |
| Speed Regulation Range | Subject to unit requirements, usually over ±10% of rated speed | Wider range brings better adaptability |
| Frequency & Voltage Regulation Accuracy | Voltage: Class ≤0.5; Frequency: Class ≤0.1 | Higher accuracy reduces grid-connection impact |
| Response Time | Preferably shorter, generally ≤ 100ms | Faster response ensures timely handling of emergencies |
| Operating Temperature | -5℃～+40℃ or wider range | Adapt to actual operating environment |
| Protection Class | IP54 and above | Good dustproof and waterproof performance |
| Communication Interface | RS-485 / MODBUS RTU / Ethernet (model dependent) | Baud rate such as 9600 is adjustable |
| Cabinet Dimension | Common size: 2260mm × 800mm × 600mm | Customizable as required |
Recommendations for Selecting Units of Different Sizes
| Unit Scale | Selection Recommendation |
|---|---|
| Large-scale Units (Thermal/Hydropower ≥60MW) | Adopt high-precision and high-reliability synchronization panels with complete automatic precise synchronization function, multi-circuit switching capacity and communication interfaces. Products equipped with high-speed DSP processing chips are preferred. |
| Medium-scale Units (10MW～60MW) | Select cost-effective synchronization panels with full functions, which must support both automatic and manual operation modes. |
| Small Units / Waste Heat Power Generation / Isolated Power Stations | Choose devices with basic synchronization functions, focusing on cost performance and easy maintenance. |
Summary
- The generator synchronization panel ensures phase sequence consistency, accurately monitors and adjusts voltage, frequency and phase difference in automatic or manual mode, and sends closing commands only when all parameters are within safe allowable limits.
FAQ
Q：How to Buy Generator Synchronization Panel？
A:Generator Synchronization Panel Factory, a Chinese manufacturer specializing in the production of power products such as relay protection and generator synchronization panels. Please feel free to contact us via WhatsApp at 1365813266.
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