scholarly journals Research on Optimal D-PMU Placement Technology to Improve the Observability of Smart Distribution Networks

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4297
Author(s):  
Kong ◽  
Yuan ◽  
Wang ◽  
Xu ◽  
Yu
Keyword(s):  
Distribution Network ◽  
Network Planning ◽  
Distribution Networks ◽  
Vulnerability Index ◽  
Optimal Placement ◽  
Measurement Unit ◽  
Solution Flow ◽  
Distribution Network Planning ◽  
Pmu Placement ◽  
Smart Distribution Network

With the continuous development of smart distribution networks, their observable problems have become more serious. Research on the optimal placement of the distribution phasor measurement unit (D-PMU) is an important way to improve the measurability, observability and controllability of a smart distribution network. In this paper, the optimal D-PMU placement methods and implementation technology were studied to determine the optimal D-PMU placement scheme. Considering the bus vulnerability index and the different operating states of the system, the more practical one-time optimal placement methods to ensure complete system observability was proposed. On this basis, the system's measurement redundancy and unobservable depth were considered to realize the multistage optimal D-PMU placement. The corresponding mathematical model and solution flow were given. Then the implementation technology of the methods was studied and the optimal D-PMU placement assistant decision-making software for smart distribution network was developed. Thereby, the structure and requirements of different distribution networks can be satisfied. The application analysis, functional architecture and the overall design process were given. Finally, the methods and software were analyzed by using the IEEE 33 bus system and an actual project, the Guangzhou Nansha Yuan'an Substation. The verification results showed that the method and software mentioned in this paper can provide convenient and quick operation for optimal D-PMU placement, improve the efficiency of smart distribution network planning work, and promote the theoretical application level of smart distribution network planning results.

scholarly journals Review on Distribution Network Optimization under Uncertainty

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3369 ◽  
Author(s):  
Huilian Liao
Keyword(s):  
Network Optimization ◽  
Optimization Problems ◽  
Distribution Network ◽  
Network Planning ◽  
Distribution Networks ◽  
Optimization Techniques ◽  
Optimization Under Uncertainty ◽  
Distribution Network Planning ◽  
Optimization Search ◽  
Planning And Operation

With the increase of renewable energy in electricity generation and increased engagement from demand sides, distribution network planning and operation face great challenges in the provision of stable, secure and dedicated service under a high level of uncertainty in network behaviors. Distribution network planning and operation, at the same time, also benefit from the changes of current and future distribution networks in terms of the availability of increased resources, diversity, smartness, controllability and flexibility of the distribution networks. This paper reviews the critical optimization problems faced by distribution planning and operation, including how to cope with these changes, how to integrate an optimization process in a problem-solving framework to efficiently search for optimal strategy and how to optimize sources and flexibilities properly in order to achieve cost-effective operation and provide quality of services as required, among other factors. This paper also discusses the approaches to reduce the heavy computation load when solving large-scale network optimization problems, for instance by integrating the prior knowledge of network configuration in optimization search space. A number of optimization techniques have been reviewed and discussed in the paper. This paper also discusses the changes, challenges and opportunities in future distribution networks, analyzes the possible problems that will be faced by future network planning and operations and discusses the potential strategies to solve these optimization problems.

scholarly journals Concepts, Structure and Developments of High-Reliability Cyber-Physical Fusion Based Coordinated Planning for Distribution System

2021 ◽  
Vol 9 ◽  
Author(s):  
Chong Gao ◽  
Tianlin Wang ◽  
Huazhen Cao ◽  
Ziyao Wang ◽  
Tao Yu ◽  
...  
Keyword(s):  
Physical System ◽  
High Reliability ◽  
Distribution Network ◽  
Network Planning ◽  
Distribution Networks ◽  
Cyber Physical System ◽  
Primary System ◽  
Secondary System ◽  
Planning Models ◽  
Distribution Network Planning

Coordinated control is imperative for the distribution network with the integration of wind power, photovoltaic system, and energy storage system. Meanwhile, the advanced automation terminal, intelligent control technology, and information communication technologies have greatly promoted the informatization of distribution networks which also increase the correlation between the physical system (primary system) and the cyber system (secondary system). Hence, it is critical to comprehensively coordinate the planning of the cyber-physical system for building a highly reliable power grid. This work summarizes a series of challenges brought by the highly coupled cyber-physical system, such as the primary and secondary collaborated planning models and solution algorithms. Then, the reliability assessment theories of cyber-physical systems and their application in distribution network planning models are introduced. Finally, three development directions of distribution network planning in the future are proposed, considering primary and secondary system coordinated planning.

scholarly journals A Survey on the Micro-Phasor Measurement Unit in Distribution Networks

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 305 ◽  
Author(s):  
Emile Dusabimana ◽  
Sung-Guk Yoon
Keyword(s):  
Power Distribution ◽  
Distribution Network ◽  
Cost Savings ◽  
Distribution Networks ◽  
Phasor Measurement Unit ◽  
Optimal Placement ◽  
Measurement Unit ◽  
Power Distribution Networks ◽  
Control Distribution ◽  
Phasor Measurement

The Micro-Phasor Measurement Unit ( μ PMU) or distribution-level PMU (D-PMU) is a measurement device that measures the synchronized voltage and current values of electric power distribution networks. The synchronized data obtained by μ PMUs can be used for monitoring, diagnostic, and control distribution network applications, so that operators can understand the dynamic states of the distribution network in real-time. In this paper, we review the state-of-the-art μ PMU research which includes a list of μ PMU applications, monitoring and diagnostic functions, control applications, and optimal placement of the μ PMU. In addition, we analyze the benefits of μ PMUs in distribution networks; in particular, their reliability and resiliency, cost savings, and environmental and policy benefits.

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