Gridphase operation introduction

As the demand for energy increases and power distribution networks become more complex, accurate phase identification has emerged as a crucial aspect of network management. Gridphase, our innovative solution, pioneers a path for robust and reliable phase identification across your entire power distribution network.

One key distinguishing feature of Gridphase is its simplicity and cost-effectiveness. Contrary to existing systems, Gridphase eliminates the need for field technicians to install a reference device to perform the measurement. A single reference device positioned in one substation is all our system needs, reducing overall setup time and costs and increasing operational efficiency.

Principle of Operation

Gridphase uses synchronized measurements of base harmonic voltage for phase identification, ensuring accurate and reliable operation.

The system combines reference devices and handheld instruments to measure synchronized voltage signals. A Global Positioning System (GPS) clock signal ensures precision in these measurements. The handheld instrument uses a bluetooth connection to the smartphone, while the reference device uses an ethernet connection, to exchange these timestamped measurements through a backend server application. Through this exchange, users can compare phases measured at the reference point to those at the measurement point, enabling the identification of matching phases as shown in Figure 1.

However, situations where phase-shifting devices like transformers exist between the reference and measurement points can complicate the process. Gridphase's patented methodology compensates for phase shifts introduced by these devices, ensuring accurate phase identification regardless of network complexity.

Figure 1

Network Model: Unified Reference Frame and Automated Compensation

The backend server application hosts a patented grid network model integral to our phase identification system. It contains network connectivity and transformer information, ensuring a consistent reference frame across the entire network.

When a technician measures voltage using a handheld device, our system compensates for phase shifts caused by devices like transformers. This compensation, depicted in Figure 2, is automatic and is informed by the location of the reference instrument and knowledge of transformer vector groups in the network. This system capability ensures accurate phase identification regardless of network complexity.

Figure 2

Virtual Reference Point: An Alternative Mechanism

Gridphase introduces an alternative to the network model called the virtual reference point. This method doesn't require a background network model, offering a practical alternative for various operational contexts.

This mechanism works by storing a measured phase at a location as an offset, typically at a transformer station. This stored offset is then used in subsequent measurements, typically downstream of a transformer. It's particularly valuable where access to a network model is challenging or not feasible, showcasing Gridphase's adaptability.

Figure 3.a

Figure 3.b

Conclusion

By introducing innovative mechanisms and leveraging synchronized voltage signal measurements, Gridphase provides an advanced approach to phase identification in power distribution networks. Its simplicity and cost-effectiveness make Gridphase the go-to solution for modern power distribution networks, ensuring robust operations and enhanced network management.