摘要：本文介绍了安科瑞APM系列交流电表在保加利亚光伏系统交流侧的应用。主要用于光伏系统中的电流的计量，配合互感器对电路系统进行计量、通讯和控制等。

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.项目概述Project Overview

该公司位于保加利亚，公司主要在保加利亚及周边国家从事小型光伏发电中心项目的设计/安装施工/维护等业务。客户想要使用交流电表APM801、APM810等和互感器，用于光伏系统交流侧电流电压的监测计量、通讯以及利用APM电表的开关量功能进行控制。

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系列仪表简介APM Series Energy Meters

ACREL的APM系列功率表是根据IEC标准设计并与国际先进技术同步的功率表。

APM系列电能表具有全功率测量、电能统计、电能质量分析和网络通信等功能，主要用于供电网络质量的综合监测。

本系列仪表采用模块化设计，具有丰富的外部DI/DO模块、AI/AO模块、带T-Flash（TF）卡的事件记录（SOE）模块、网络通信模块、温湿度测量模块功能，可实现电路全功率测量和开关状态监测，具有以太网接口的双RS485可实现RS485主站的数据拷贝，无需进行数据交换。PROFIBUS-DP接口可实现高速数据传输和联网功能。

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.型号及功能介绍Type and Function Description

4. 技术参数Technical parameters

Table 2 technical parameter descriptions

5.客户特殊需求  Requirements from Customer

电网供应商要求：

(1) 监控电压：L1-N、L2-N、L3-N。非标称 = 230V

(2) 过压时切换继电器输出。分为两步，

    第 1 步：110% 非标称或 253V - 延迟 60 秒（s）；

    第2步，115% 的非标称或 264V - 延迟 0.1s；设置范围： U：非标称的 100-140%，未列出步骤，可能是 1V 或 1%；延迟0.05s 到 60s，未列出步骤，可能 1s；      

(3) 欠压时切换继电器输出：

第①步；非标称电压或 184V 的 80% - 延迟 0.2s；设置范围： U：非标称电压的 10-100%，未列出步骤，可能是 1V 或 1%；延迟0.05 s 到 3s，步骤未列出，可能为 1s；

(4) 过频时切换继电器输出：

    第①步； 50.5Hz——延迟0.1s；设置范围：F：50-52.5Hz，step 0.1Hz；延迟

(5) 超频时切换继电器输出

(6) 恢复延迟。由于先前的一些原因，当DO打开时，在网格参数回到标称范围后应该有时间延迟。时间范围1-60秒，step 1秒

(7) 附加设置。(如果可能的话)。

   7.1.当非标称值低于60-70% 时，可禁用低频和超频监测;

   7.2. 当发生超频/低频时 -- DO不应该自动恢复，它应该等待手动/远程等方式恢复。

terms of reference from grid supplier:

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

（2）switching 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;

（3）switching relay output at undervoltage:

1-step; 80% of Unominal or 184V - delay 0.2s; Range of settings: U: 10-100% of Unominal, step not listed, maybe 1V ot 1%; Delay: 0.05 s to 3s, step - not listed, maybe 1s;

（4）switching 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;

（5）switching 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;

（6）Delay 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

（7）Additional 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.

上述7点为客户对所采购产品的特殊需求，除第七点中部分要求不能满足客户外，其余需求都能满足。基本完好解决了客户的需求。

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.安装图片Installation Picture

参考文献 Bibliography

1.Solutions For Enterprise Micro-grid System 2021.04

安科瑞 缪阳扬

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