Low-voltage Meter Research Articles

Automated Type Identification and Size Measurement for Low-Voltage Metering Box Based on RGB-Depth Image

Automated Type Identification and Size Measurement for Low-Voltage Metering Box Based on RGB-Depth Image

Design of IoT based smart compact energy meter for monitoring and controlling the usage of energy and power quality issues with demand side management for a commercial building

Internet of Things (IoTs) plays a vital role in energy sector which introduces a smart metering and monitoring system. The smart monitoring focuses on incorporating smart meters and control techniques which requires smart equipment control, bidirectional communication, integration of network and users. In this paper, a new Commercial Building Energy Management System (CBEMS) using IoT based Smart Compact Energy Meter (SCEM) is proposed to monitor and control the energy usage and power quality issues. In addition, Demand Side Management (DSM) for a commercial building in proposed using IoT. Here, low-voltage metering hardware uses Advanced Reduced Instruction Set Computing (RISC) Machines (ARM) cortex and real-time operating system. The choice of ARM microprocessor aims at rendering a wide range of complex operations such as data acquisition, processing, disturbance detection and classification, consumption and data exchange which consequently requires optimization of the embedded software. The IoT based SCEMs with CBEMS is implemented in real time commercial building at M/s Quantanics Techserv Private Limited. Here, the load pattern of M/s Quantanics Techserv Private Limited is dynamically optimized using DSM after successfully integrating CBEMS. The operation of monitoring and controlling commercial appliances are examined and validated remotely using the mobile Blynk application. The proposed SCEMs analyzesthe power quality at low cost with high accuracy in detecting and classifying the disturbances. The proposed SCEM output values are compared with standard Elmeasure iM-8000 meter and the results are tabulated. • Designing Smart Compact Energy Meter (SCEM) with inbuilt IoT for monitoring energy consumption. • Proposing Commercial Building Energy Management System (CBEMS) for analyzing real time data. • Implementing Demand Side Management and classifying power quality disturbances. • Performance of SCEM is validated in a commercial building at M/s Quantanics Techserv Pvt. Ltd. • Recorded values of SCEM is compared with standard Elmeasure iM-8000 meter.

论低压计量箱实验室之建设

2013年国家电网公司正式颁布了《低压计量箱技术规范》标准，其相应行业标准也即将发布。标准中对计量箱试验项目、方法都进行了严格规范，使其制造、检验工作有了可循依据。而建立计量箱专用实验室，实施计量箱各项试验，开展计量箱型式检验、验收检验、质量监督就成为一项重要的例行工作。对各省电力检测机构，都面临建设新计量箱实验室任务，如何建立完善的、符合技术标准要求的计量箱实验室，则需要一个技术指导。通过对计量箱试验项目分析、试验流程设计，试验场地规划，并借助流水线检测技术应用给出了一个系统的、全面的计量箱实验室解决方案，使之能够多快好省地建成一个现代化、自动化的高标准检测实验室，确保计量箱检测工作顺利开展，为计量箱产品最终更新换代提供技术保障。 State Grid Corporation of China has officially promulgated the standard “technical specifications of low-voltage metering cabinet” in 2013, and the corresponding industry standards are also soon to be released. In this standard, tests on metering cabinet as well as their test methods are strictly regulated, so that the manufacturing and inspection of metering cabinet have basic rules to follow. As a result, setting up the laboratory specialized for metering cabinet and performing every tests have become an important routine, to implement type approval, inspection, and quality supervision of metering cabinet.For each provincial electric power testing authority who faces the task of setting up new laboratory for metering cabinet, technical guides are needed to make the laboratory excellent and coincident with technical requirements. By analyzing the tests, designing the testing procedure, and planning the testing site, followed by an application based on assembly line testing technique, a systematical and thorough solution is then proposed, which enables a fast and economic way to setting up metering cabinet laboratory, to ensure a smooth development of me-tering cabinet, furthermore, to provide technical supporting for the updating and evolving of the product.

The Theoretical Study and Error Analysis about On-Site Calibrating Technology of Low-Voltage Metering Device Composition Error

The paper mainly discusses how to calculate composition error of low-voltage metering device. The composition error of metering device, the error of power meter and the ratio error of CT were calculated also by comparing the standard power meter with the calibrated power meter .The formula of error calculation was put forward, that will has an important guiding significance for the development of on-site calibrating instrument

전자식 계기 IEC 61000-4-6 EMS 시험표준 적용 타당성 연구

Electricity meters using in Korea are about 1.8 million units. From among these, electronic meters for high voltage, about 170 thousand units were installed to the digital type meter and ones for low voltage installed hundreds of thou-sands of meters through a model project. Recently, low voltage meter are expected to complete the installation within several years. Domestic power metering technology is being beyond a simple framework with an electronic type and is rapidly evolving to intelligent smart metering systems in conjunction with promotion of a national smart grid project. Accordingly, it is important to ensure an immunity of meter for electromagnetic field and environmental noise at the installation site. In this paper, we are going to check the validity of international standard that focusing on RF electromagnetic field immunity of meter to secure the quality and improve the reliability in field operation of meter. And we will verify the validity of test specification focused on actual installation environment and are going to offer the improvement plan of test standard.

330-Kv Power Transformer with Compensation to Provide Accurate Low-Voltage Metering Potential [includes discussion

The problem of obtaining an accurate representation of 330-kv bus potential to be used in metering energy and reactive interchange over 330-kv tie lines was economically solved by the use of a network applied to a power transformer to compensate for voltage transformation errors due to load on the transformer. This paper describes the design, testing, and operation of such a potential compensating network used with a power transformer. By its use the need for two 3-phase banks of expensive 330-kv potential transformers together with their foundations and switches was eliminated at no sacrifice of metering accuracy.