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Weiqing Tao
School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China

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Journal article
Published: 24 April 2020 in Applied Sciences
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The wide area measurement system (WAMS) based on synchronous phasor measurement technology has been widely used in power transmission grids to achieve dynamic monitoring and control of the power grid. At present, to better realize real-time situational awareness and control of the distribution network, synchronous phasor measurement technology has been gradually applied to the distribution network, such as the application of micro multifunctional phasor measurement units (μMPMUs). The distribution network phasor data concentrator (DPDC), as a connection node between the μMPMUs and the main station, is also gaining more attraction. This paper first analyzes the communication network structure of DPDCs and μMPMUs and compares and analyzes the differences in the installation locations, functions, communication access methods and communication protocols of the phasor technology devices of the distribution network and the transmission network. It is pointed out that DPDCs not only need the functions of data collection, storage, and forwarding like transmission network PDCs, but also should be able to access more μMPMUs, and can aggregate the phasor data of the same time scale from μMPMUs by different communication methods. The communication protocol selected by DPDC should be expanded to support remote control, telemetry, fault diagnosis and other functions of distribution automation. The application requirements of DPDCs are clarified, and the key indicators of DPDCs are given as a method to evaluate the basic performance of DPDCs. Then, to address the problems of more μMPMU access, abnormal communication, and data collection with different delays that DPDC encountered, a DPDC that considers multiple communication methods is designed. Based on the Linux system and the libuv library, the DPDC is designed with event-driven mechanism and structured programming, runs multiple threads to implement multitasking, and invokes callbacks to perform asynchronous non-blocking operations. The DPDC test system and test methods are designed. The performance of the designed DPDC is evaluated through the test and the test results are analyzed. Lastly, its real-world application is disclosed, which further confirmed the value of our DPDC.

ACS Style

Weiqing Tao; Mengyu Ma; Chen Fang; Wei Xie; Ming Ding; Dachao Xu; Yangqing Shi. Design and Application of a Distribution Network Phasor Data Concentrator. Applied Sciences 2020, 10, 2942 .

AMA Style

Weiqing Tao, Mengyu Ma, Chen Fang, Wei Xie, Ming Ding, Dachao Xu, Yangqing Shi. Design and Application of a Distribution Network Phasor Data Concentrator. Applied Sciences. 2020; 10 (8):2942.

Chicago/Turabian Style

Weiqing Tao; Mengyu Ma; Chen Fang; Wei Xie; Ming Ding; Dachao Xu; Yangqing Shi. 2020. "Design and Application of a Distribution Network Phasor Data Concentrator." Applied Sciences 10, no. 8: 2942.

Journal article
Published: 24 May 2019 in Applied Sciences
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With the advancement of active distribution network construction, to solve the shortcomings of the existing distribution network technology in distribution network perception and control, the relevant technologies of the Wide Area Measurement System (WAMS) in the transmission network have attracted more attention in terms of their usage in the distribution network. Micro Multifunction Phasor Measurement Unit (μMPMU), as an example, is being gradually utilized in the distribution network. However, the existing synchronous phasor transmission protocol is mainly designed for the transmission network, which requires an extension to meet the communication requirements to be directly used in the distribution network. In this work, the requirements of active distribution network communication are analyzed, and trade-offs between National Standard of the People’s Republic of China/Recommended (GB/T) 26865.2-2011 and International Electro technical Commission (IEC) 60870-5-101/104 protocol are compared. An extension method of the communication protocol is proposed, with the benefits of the prioritized transmission of important data, expanded remote control function of μMPMU, increased types of offline files, and reduced amount of network communication and data storage. The method is built upon the existing GB/T 26865.2-2011 protocol, and refers to the Application Service Data Unit (ASDU) of IEC 60870-5-101/104 to add an application extension frame. Application extension frames are used to transmit telemetry data, telesignalization, partial commands, and partial offline files. Finally, an experimental environment is set up, which includes a phasor measurement unit (PMU) Emulator, distribution network phasor data concentrator (PDC), and main station emulator to implement the standard GB/T 26865.2-2011 protocol and extension protocol. The feasibility and effectiveness of the method are confirmed by the superior performance of the extended protocol compared with the standard protocol.

ACS Style

Weiqing Tao; Mengyu Ma; Ming Ding; Wei Xie; Chen Fang. A Priority-Based Synchronous Phasor Transmission Protocol Extension Method for the Active Distribution Network. Applied Sciences 2019, 9, 2135 .

AMA Style

Weiqing Tao, Mengyu Ma, Ming Ding, Wei Xie, Chen Fang. A Priority-Based Synchronous Phasor Transmission Protocol Extension Method for the Active Distribution Network. Applied Sciences. 2019; 9 (10):2135.

Chicago/Turabian Style

Weiqing Tao; Mengyu Ma; Ming Ding; Wei Xie; Chen Fang. 2019. "A Priority-Based Synchronous Phasor Transmission Protocol Extension Method for the Active Distribution Network." Applied Sciences 9, no. 10: 2135.