DGP Scalability is shown in two use cases. One with ten solar sites on a single 23KV feeder and the other with six solar sites connected across three 23KV feeders.
DGP's difference
Safer than autonomous detection, simpler and lower cost than traditional transfer trip
| Feature / Barrier | No DTT | Traditional DTT | GridEdge DGP |
|---|---|---|---|
| Signaling Method | Local inverter-based detection | External communications (fiber, phone, radio) | Powerline conducted permissive signal |
| Response Time | 0.5–2 seconds (IEEE 1547) | Dependent on the communications channel latency | Programmable (loss of signal triggers trip) |
| Deployment Time | N/A | 6-12 months | 2 months |
| Cost | Low - Embedded in inverter cost | High | Medium |
| Scalability | N/A | Complex reconfiguration with new added DERs | Plug-and-play for new DERs (only receiver needed) |
| Reliability | May fail with DER diversity and ride through requirements | Dependent on the communication channel | High – failsafe method |
| Utility Control | No | Yes | Yes |
| Fiber DTT | Phone DTT | Radio DTT | Cellular DTT | Grid Edge DGP |
|---|---|---|---|---|
| Reliable and Cyber-secure | Old technology that is becoming obsolete; Phone carriers discontinuing service | Line of sight limitations; can only be used for short distances | Coverage in rural areas may not exist | 100% dependable |
| Large bandwidth/fast speeds/low latency | Poor reliability in some locations: outages leading to loss of revenue for IPP | Requires building costly towers when no line of sight | Can have long response time | Failsafe permissive signal technology |
| Very high cost: can be hundreds of thousands of dollars | Fee-based monthly service ; In long term, high cost due to operational expenses | Vegetation growth can block radio signal | Connection may not be there when most needed | Scalable and cost effective for hight penetartion cases |
| Not scalable or flexible for high penetration cases | Being discontinued Poor reliability in some locations | Can be affected by severe weather and wind moving antennas | Dependency on cellular network providers | Highly secure and immune to attacks |
| Cost prohibitive in rural areas; can kill small projects | --- | Limited use due to line of sight limitations | Fee-based monthly service;In long term, high cost due to apex | Utility controlled |
| High cost | --- | --- | Availability | Makes circuit DG READY |
| --- | --- | --- | --- | Recognized method in new IEEE 1547.1 std |
| --- | --- | --- | --- | Low risk/low cost |
DGP: Technical Resources
DGP downloads for technical teams
DGP downloads for technical teams
- Get technical specs, system components, and deployment details.
36KV DGP Data Sheet 69KV DGP Data Sheet - Download Application Notes
Explore real-world strategies for unintentional islanding protection. 36KV Distribution App Note 69KV Sub-Transmission App Note
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