The IS210AEPSG1B is a Control Power Supply Board designed by General Electric (GE) for its 2.x MW Permanent Magnet Generator (PMG) wind power converter system. This board is an upgraded version within the AEPS series, optimized and improved upon the G1A. It is primarily used to provide stable and reliable DC power to the control circuits within the wind power converter, ensuring normal operation of the control system even during fluctuations in the main circuit voltage.
The IS210AEPSG1B board plays a critical role in the wind power converter system. It draws power from the high-voltage DC link and converts it into multiple isolated DC voltages via internal circuitry. These provide operating power for the MACC control board, various interface boards such as AEAA, AEAC, AEAB, and communication interfaces (CANbus, serial port). The board features multiple LED indicators for status display of each output voltage, multiple test points for on-site measurement and fault diagnosis, and multiple fuses for overcurrent protection.
Compared to the G1A version, the G1B version has been optimized in the following areas:
Enhanced Stability: Optimized internal circuit design for improved operational stability in harsh environments.
Improved Compatibility: Better support for V2 and V3 hardware versions of the converter system.
Optimized Protection Characteristics: Improved overcurrent protection features, enhancing system reliability.
Updated Firmware: Pre-loaded with updated firmware supporting the latest software features.
Key features of the IS210AEPSG1B include:
High-Voltage DC Input: Draws power directly from the DC link, wide input voltage range.
Multiple Isolated Outputs: Provides multiple isolated DC voltages to meet the requirements of different circuits.
Status Indication: Multiple green LED indicators show the status of each output voltage.
Test Points: Equipped with several test points for convenient on-site measurement of key voltages.
Comprehensive Protection: Each output is protected by fuses, providing overcurrent protection.
Modular Design: The board mounts in the CMC or Thread converter cabinet, connecting to the system via connectors.
Jumper Configuration: Jumper JP1 configures the board's operating mode (CMC or Thread converter cabinet).
The board has two installation locations within the 2.x MW PMG wind power converter system:
II. Main Functions
The primary functions of the IS210AEPSG1B include, but are not limited to, the following:
1. High-Voltage DC Input Conversion
The IS210AEPSG1B board receives high-voltage DC input from the DC link and generates multiple stable low-voltage DC outputs via internal DC-DC converters. The input voltage is protected by fuse FU1, which has no status indication. Compared to the G1A, the G1B's input circuit has stronger surge withstand capability, better handling grid transients.
2. Multiple Isolated DC Outputs
The board provides multiple isolated DC output voltages for different loads:
| Output | Voltage | Current | Application |
| P24A | 24 V dc | 1.5 A | Provides 24 V control power to the MACC control board |
| IP24 | 24 V dc (Isolated) | 0.5 A | Provides isolated tachometer power to the MACC control board |
| IP5A | 5 V dc (Isolated) | 0.5 A | Provides isolated serial port power to the MACC control board |
| IP5B | 5 V dc (Isolated) | 0.5 A | Provides isolated CANbus power to the MACC control board |
| P24C | 24 V dc | 2 A | Provides control power to AEAA, AEAC, AEAB interface boards |
| N24C | -24 V dc | 2 A | Provides negative control power to AEAA, AEAC, AEAB interface boards |
| AC1/AC2 | 25 kHz square wave | 2 A | Provides 25 kHz power to AEDB and AEBI boards (used only in Thread cabinets) |
The G1B version's output power supplies feature better load regulation and ripple rejection, ensuring output voltage stability under load variations.
3. Status Indication
The board features multiple green LED indicators for displaying the status of each output voltage:
| LED | Indicates | Normal State | Fault State |
| DS1 | IP24 Output | Lit | Off (check FU5) |
| DS2 | P24A Output | Lit | Off (check FU4) |
| DS3 | N24C Output | Lit | Off (check FU7) |
| DS4 | P24C Output | Lit | Off (check FU6) |
| DS5 | IP5A Output | Lit | Off (check FU8) |
| DS6 | IP5B Output | Lit | Off (check FU9) |
The G1B version uses higher brightness LEDs, clearly visible even in strong ambient light.
4. Test Points
The board features several test points for convenient on-site measurement of key voltages:
| Test Point | Signal | Description |
| TP1 | P48B | 48 V local power supply positive |
| TP2 | PCOM | 48 V local power supply common |
| TP3 | PCOM | 24 V control power common |
| TP4 | P24A | 24 V control power (to MACC) |
| TP5 | PCOM | 24 V control power common |
| TP6 | I24COM | Isolated 24 V power common |
| TP7 | I5COM | Isolated 5 V power common |
| TP8 | I5COM | Isolated 5 V power common |
| TP9 | AC2 | 25 kHz power common |
5. Fuse Protection
The board features multiple fuses providing overcurrent protection for each output:
| Fuse | Rating | Protected Circuit | Status Indication |
| FU1 | 600 V, 15 A | DC Link Input | None |
| FU4 | 250 V, 1.5 A | P24A Output (to MACC) | DS2 |
| FU5 | 250 V, 0.5 A | IP24 Output (to MACC Tach) | DS1 |
| FU6 | 250 V, 2 A | P24C Output (to interface boards) | DS4 |
| FU7 | 250 V, 2 A | N24C Output (to interface boards) | DS3 |
| FU8 | 250 V, 0.5 A | IP5A Output (to MACC Serial) | DS5 |
| FU9 | 250 V, 0.5 A | IP5B Output (to MACC CANbus) | DS6 |
| FU10 | 250 V, 2 A | 25 kHz power (to AEDB) | None |
| FU12 | 250 V, 2 A | 25 kHz power (to AEBI) | None |
The G1B version features an improved fuse holder design for more reliable contact, reducing failures caused by poor contact.
6. Jumper Configuration
Jumper JP1 configures the board's operating mode:
| Jumper Position | Mode | Description |
| IN | Thread Cabinet Mode | AEPS board installed in a Thread converter cabinet |
| OUT | CMC Mode | AEPS board installed in the Converter Master Cabinet |
III. System Applications
1. Application in 2.x MW PMG Wind Power Converter System
The IS210AEPSG1B is the core power supply board for control circuits within the 2.x MW PMG wind power converter system, particularly suitable for V2 and V3 hardware versions. Its roles within the system include:
Control Power Supply: Provides stable DC power to control boards in the CMC and Thread converter cabinets.
Isolated Power Supply: Provides isolated power for tachometers, serial ports, and CANbus communication interfaces, ensuring signal quality.
25 kHz Power Supply: Provides 25 kHz square wave power to AEDB and AEBI boards for IGBT gate drive.
2. Application in the CMC
Within the CMC, the IS210AEPSG1B board is installed in the CMC cabinet. It provides power to the CMC MACC board via the P1 connector and to the AEAA and AEAC boards via P18A1/P18A2. Jumper JP1 should be set to the OUT position in this mode.
3. Application in Thread Converter Cabinets
Within each Thread converter cabinet, the IS210AEPSG1B board is mounted on the cabinet's side door. It provides power to the Thread MACC board via the P1 connector, to the AEAB board via P18A1, and 25 kHz power to the AEDB and AEBI boards via P2. Jumper JP1 should be set to the IN position in this mode.
4. Differences from the G1A Version
The G1B version outperforms the G1A in the following areas:
Better Environmental Adaptability: Optimized circuit design for stable operation under more stringent environmental conditions.
Enhanced Compatibility: Fully compatible with V2 and V3 hardware versions of the converter system, including CWE (Cold Weather Extreme) versions.
Higher Reliability: Improved protection features, reducing the risk of system shutdown due to power supply failures.
Updated Firmware: Pre-loaded with firmware supporting the latest software features.
5. Typical Application Scenarios
Wind Power Converter Control Power: Provides multiple power supplies for the control system of 2.x MW PMG wind power converters.
Extreme Climate Applications: Suitable for CWE (Cold Weather Extreme) versions of the converter system.
Industrial Power Conversion: Used in industrial control systems requiring multiple isolated power supplies.
Renewable Energy Systems: Applicable in control systems for other types of renewable energy converters.
IV. Detailed Interface Description
1. Input Interface
| Connector | Pins | Signal | Description |
| E1/E2 | - | DC Bus | DC link input, protected by FU1 |
| P1 | - | To MACC | Provides power to the MACC control board |
2. Output Interfaces
| Connector | Pins | Signal | Description |
| P18A1 | - | To AEAA/AEAB | Provides power to AEAA (CMC) or AEAB (Thread) |
| P18A2 | - | To AEAC | Provides power to AEAC board (CMC only) |
| P2 | - | To AEDB/AEBI | Provides 25 kHz power to AEDB and AEBI boards (Thread only) |
3. Test Points
| Test Point | Signal | Description |
| TP1 | P48B | 48 V local power supply positive |
| TP2 | PCOM | 48 V local power supply common |
| TP3 | PCOM | 24 V control power common |
| TP4 | P24A | 24 V control power (to MACC) |
| TP5 | PCOM | 24 V control power common |
| TP6 | I24COM | Isolated 24 V power common |
| TP7 | I5COM | Isolated 5 V power common |
| TP8 | I5COM | Isolated 5 V power common |
| TP9 | AC2 | 25 kHz power common |
4. LED Indicators
| LED | Color | Indicates | Troubleshooting |
| DS1 | Green | IP24 output OK | If off, check FU5 |
| DS2 | Green | P24A output OK | If off, check FU4 |
| DS3 | Green | N24C output OK | If off, check FU7 |
| DS4 | Green | P24C output OK | If off, check FU6 |
| DS5 | Green | IP5A output OK | If off, check FU8 |
| DS6 | Green | IP5B output OK | If off, check FU9 |
5. Jumper JP1
| Position | Mode | Description |
| IN | Thread Mode | AEPS installed in a Thread converter cabinet |
| OUT | CMC Mode | AEPS installed in the Converter Master Cabinet |
V. Diagnostics and Maintenance
1. LED Status Diagnosis
The AEPSG1B board provides status diagnosis via 6 green LED indicators:
| Symptom | Possible Cause | Troubleshooting Suggestion |
| DS1 off | FU5 blown, IP24 output fault | Check FU5, replace with same specification fuse |
| DS2 off | FU4 blown, P24A output fault | Check FU4, replace with same specification fuse |
| DS3 off | FU7 blown, N24C output fault | Check FU7, replace with same specification fuse |
| DS4 off | FU6 blown, P24C output fault | Check FU6, replace with same specification fuse |
| DS5 off | FU8 blown, IP5A output fault | Check FU8, replace with same specification fuse |
| DS6 off | FU9 blown, IP5B output fault | Check FU9, replace with same specification fuse |
2. Test Point Measurements
Using a multimeter to measure test points allows quick verification of output voltages:
| Test Point | Normal Voltage | Measurement Reference |
| TP1 | 48 V dc | TP2 |
| TP4 | 24 V dc | TP5 |
| TP6 | 24 V dc (Isolated) | TP6 itself is common |
| TP7/TP8 | 5 V dc (Isolated) | TP7/TP8 themselves are common |
| TP9 | 25 kHz square wave | TP9 itself is common |
3. Common Troubleshooting
| Fault Symptom | Possible Cause | Troubleshooting Suggestion |
| All LEDs off | Input power fault, FU1 blown | Check DC link voltage, check FU1 |
| Individual LED off | Corresponding fuse blown | Check the specific fuse, replace with same specification fuse |
| Low output voltage | Overloaded load, poor fuse contact | Check load, check fuse holder |
| No 25 kHz output | FU10/FU12 blown | Check FU10 and FU12 |
| Intermittent fault | Poor contact, high ambient temperature | Check connectors, check ventilation and cooling |
4. Maintenance Recommendations
Periodic Inspection: Check LED indicator status every six months to ensure all outputs are normal.
Fuse Replacement: Always replace fuses with the exact same specification and ensure good contact.
Cleaning: Regularly clean the board to prevent dust accumulation affecting heat dissipation.
ESD Protection: Wear a grounding strap when handling the board and store it in anti-static bags.
Spare Parts Management: Maintain a spare AEPSG1B board to reduce downtime in case of failure.
VI. Installation and Replacement
1. Mounting Location
The IS210AEPSG1B board can be mounted in either the CMC or a Thread converter cabinet. Jumper JP1 must be set correctly according to the installation location.
2. Replacement Procedure
Safety Warnings:
WARNING: To prevent electric shock, turn off relevant power and follow all GE safety procedures and lockout/tagout practices before replacing the board.
CAUTION: To prevent component damage caused by static electricity, treat all boards with static sensitive handling techniques. Wear a grounding strap and store boards in anti-static bags.
Replacement Steps:
Verify Power Off: Ensure the CMC or Thread cabinet is completely de-energized.
Open Cabinet Door: Open the appropriate cabinet door and locate the AEPS board to be replaced.
Disconnect Connections:
Remove Old Board: Lift the board off the mounting post and remove the old board.
Inspect New Board: Verify the jumper JP1 setting on the new board is correct.
Install New Board:
Align the new board with the mounting posts and holes, ensuring the center nut post passes through the board.
Secure the board using the four corner mounting screws and the center mounting nut.
Reconnect Connections:
Verify Installation: Check that all connections are secure.
Restore Power: Close the cabinet door and restore power to the system.
