ACREL AC energy meter’s Application in PV system in Bulgaria

    朱鹍

    安科瑞电气股份有限公司,上海 嘉定 201801

    Abstract: This paper introduces the application of ackry APM series AC meter in the AC side of Bulgarian photovoltaic system. It is mainly used to measure the current in the photovoltaic system, and cooperate with the transformers to measure, communicate and control the circuit system.

     

    1.Project Overview

       The company is located in Bulgaria. The company is mainly engaged in the design / installation, construction / maintenance of small photovoltaic power generation center projects in Bulgaria and surrounding countries. The customer wants to use AC meters apm801, apm810 and mutual inductors for monitoring, metering and communication of current and voltage at the AC side of photovoltaic system, and control by using the switching value function of APM meter.

     

    2.APM Series Energy Meters 

       APM series power meters of ACREL are power meters that are designed according to IEC standards and synchronized with international advanced technology.

    APM series meters have full power measurement, energy statistics, analysis of power quality and network communications and other functions, are mainly used for comprehensive monitoring of the quality of power supply network.

    This series of meters use a modular design, with a rich function of the external DI / DO module, AI / AO module, event recording (SOE) module with T-Flash (TF) card, network communication module, Temperature and humidity measurement module, can achieve full power measurement of electrical circuit and monitoring of switch status, Dual RS485 with Ethernet interface can realize data copying of RS485 master station, eliminating the need for data switching exchange. PROFIBUS-DP interface can realize high-speed data transmission and networking function.

     

    3.Type and Function Description

     

     

    4.Technical parameters

     

     

      

    5.Requirements from Customer

     terms of reference from grid supplier: 

    1monitoring voltages: L1-N, L2-N, L3-N. Unominal = 230V; 

    2switching relay output at overvoltage: 2 steps: 

     Step 1: 110% of Unominal or 253V - delay 60 seconds (s) ; 

     Step 2: 115% of Unominal or 264V - delay 0.1s;

    3switching relay output at undervoltage: 

    1-step; 80% of Unominal or 184V - delay 0.2s; Range of settings: U: 10-** of Unominal, step not listed, maybe 1V ot 1%; Delay: 0.05 s to 3s, step - not listed, maybe 1s; 

    4switching relay output at overfrequency

    1-step; 50.5Hz - delay 0.1s; Range of settings: F: 50-52.5Hz, step 0.1Hz; Delay: 0.1-0.5s, step - maybe 0.1s; 

    5switching relay output at overfrequency

    1- step; 47.5Hz - delay 0.1s; Range of settings: F: 47.5-50Hz, step 0.1Hz; Delay: 0.1-0.5s, step - maybe 0.1s; 

    6Delay for recovering. When DO is on by some of previous reasons, there should be time delay after grid parameter(s) are back in nominal range(s). Time range 1-60s, step 1s 

    7Additional settings. (If they are possible).   

    7.1 When Unominal is lower than 60-70%, under and overfrequency monitoring can be disabled

    7.2 When overfrequency/underfrequency is happened - the DO should not be recovered automatically, it should wait for some kind of manual/remote restore.

     

      The above 7 items are the special needs of customers for the purchased products. Except that some requirements in point 7 cannot meet the needs of customers, other needs can be met. Basically solved the needs of customers.

     

    6.Installation Picture

     

     Bibliography

    1.Solutions For Enterprise Micro-grid System 2021.04

    作者简介:

    朱鹍,女,就职于安科瑞电气股份有限公司,主要研究方向为企业能源管控

    @手机:QQ


    安科瑞电子商务(上海)有限公司专注于变电所运维云平台,安全用电管理云平台,环保用电监管云平台等, 欢迎致电 15000353138

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