HFCT高頻電流局放在線監(jiān)測裝置使用說明書

高頻電流局放在線監(jiān)測裝置高頻電流局放在線監(jiān)測裝置高頻電流局放在線監(jiān)測裝置使用說明書杭州輝能電力技術有限公司二〇二〇年九月一、概述高頻局部放電檢測方法是用于電力設備局部放電缺陷檢測與定于的常用測3-30MHz其高頻脈沖電流信號由電感式耦合傳感器進行耦合。（HighFrequencyCurrent簡稱電流信號進行檢測。高頻局放檢測技術的技術優(yōu)勢：1、可進行局部放電強度的量化描述2、具有便于攜帶、方便應用、性價比高等優(yōu)點3、檢測靈敏度較高，高頻電流傳感器一般由環(huán)形鐵氧體磁芯構成，鐵氧體配合經(jīng)磁化處理的陶瓷材料，對于高頻信號具有很高靈敏度，局部放電發(fā)生后，放電脈沖電流將沿著接地線的軸向方向傳播，即會在垂直于電流傳播方向的平面上產(chǎn)生磁場，電感型傳感器是從該磁場中耦合放電信號。二、產(chǎn)品原理高頻電流傳感器其有效的頻率監(jiān)測范圍一般為3-30MHz，由于所測量的局部放電信號是微弱高頻電流信號，傳感器需要在較寬的頻帶內(nèi)有較高的靈敏度，因此HFCT選用高磁導率的磁芯作為線圈骨架。數(shù)據(jù)處理終端，高頻局部放電監(jiān)測裝置結構框圖如下圖所示。1、傳感器

圖1：系統(tǒng)結構框圖高頻局部放電監(jiān)測HFCT傳感器按安裝位置不同主要分為接地線HFCTHFCTHFCT測試安裝和拆卸，可以使用一個傳感器對設備多個位置進行測量。2、信號處理單元號信噪比的目的。3、信號采集單元將實際采集到的模擬信號轉換為可供進一步處理的數(shù)字信號。4、數(shù)據(jù)處理終端將實際采集到的數(shù)字信號經(jīng)過進一步的算法處理，通過網(wǎng)口或RS485通訊接口，將數(shù)據(jù)上傳到終端顯示平臺進行顯示。三、產(chǎn)品功能1、性能指標適用范圍電流電纜、變壓器供電電壓220AC使用壽命大于5年通道數(shù)3路HFCT信號采集通訊方式RS-485安裝方式卡扣式安裝檢測原理HFCT測量范圍-80--20dbm分辨率1dbm頻率帶寬3-30MHz2、安裝位置說明圖2：變壓器類設備安裝位置圖3：電容性設備及避雷器設備安裝位置圖4：電力電纜及附件四、實物照片4.1特高頻局放傳感器圖5：高頻電流傳感器圖6：局放處理主機五、通訊協(xié)議本文檔定義高頻電流局放在線監(jiān)測裝置通訊訊協(xié)議規(guī)范，該協(xié)議以ModbusRS485與設備對接二、讀寄存器狀態(tài)協(xié)議RS485波特率：9600bps數(shù)據(jù)位：8停止位：1奇偶校驗：無RTS/DTR:無輪詢間隔：大于200ms數(shù)據(jù)通訊協(xié)議通訊幀格式定義命令幀：上位機發(fā)送給終端的數(shù)據(jù)格式，即讀取數(shù)據(jù)時，發(fā)送給終端的命令字，終端解析命令字后，上傳相關數(shù)據(jù)。數(shù)據(jù)幀：終端發(fā)送給上位機的數(shù)據(jù)格式命令幀格式：說明字節(jié)數(shù)備注設備地址1下位機設備的地址功能碼1各種命令的標識HI1要讀的寄存器的起始地址的高地址開始地址LO1要讀的寄存器的起始地址的低地址要讀的寄存器所占的字節(jié)長度1要讀的寄存器所占的字節(jié)長度的高要讀的寄存器所占的字節(jié)長度1要讀的寄存器所占的字節(jié)長度的低錯誤校驗碼LO1錯誤校驗碼的低字節(jié)HI1錯誤校驗碼的高字節(jié)數(shù)據(jù)幀格式：說明字節(jié)數(shù)備注設備地址1下位機設備的地址功能碼1各種命令的標識返回有效數(shù)據(jù)長1下位機返回有效數(shù)據(jù)長度返回有效數(shù)據(jù)寄存器數(shù)*2下位機返回的各個寄存器對應的值錯誤校驗碼LO1錯誤校驗碼的低字節(jié)HI1錯誤校驗碼的高字節(jié)命令字功能碼定義（2節(jié)為低位比特命令字：03功能：讀取局放相關數(shù)據(jù)例：上位機發(fā)送命令幀如下：010300000005XXXX命令幀解析：01：設備地址0103：功能碼，讀取局放相關數(shù)據(jù)00 00：讀寄存器的起始地址0x000000 05：讀寄存器個數(shù)，0x0005，讀5個寄存器的數(shù)XX XX：CRC校驗碼數(shù)據(jù)幀響應數(shù)據(jù)如下：0103000A0x05*2=10字節(jié)XXXX數(shù)據(jù)幀解析如下：01：設備地址0103：功能碼，讀取局放相關數(shù)據(jù)有效數(shù)據(jù)長度：000A （讀寄存器個數(shù)*2字節(jié)有效數(shù)據(jù)：（寄存器數(shù)*2）個數(shù)據(jù)CRC校驗碼：xxxx寄存器數(shù)據(jù)解析在后。地址類型數(shù)據(jù)類型備注第1通道HFCT數(shù)據(jù)0x0000采樣均值短整型（2字節(jié)）乘以-1（dbm）0x0001采樣峰值短整型（2字節(jié)）乘以-1（dbm）0x0002峰值相位短整型（2字節(jié)）乘以360/64（°）0x0003保留短整型（2字節(jié)）默認為00x0004故障預警等級短整型（2字節(jié)）預警等級：0：設備運行正常（疑似局放2：持續(xù)關注3：重點關注0x0005……0x0044采樣圖譜短整型（2字節(jié)）64*2=128第2通道HFCT數(shù)據(jù)0x0045采樣均值短整型（2字節(jié)）乘以-1（dbm）0x0046采樣峰值短整型（2字節(jié)）乘以-1（dbm）0x0047峰值相位短整型（2字節(jié)）乘以360/64（°）0x0048保留短整型（2字節(jié)）默認為00x0049故障預警等級短整型（2字節(jié)）預警等級：0：設備運行正常（疑似局放2：持續(xù)關注3：重點關注0x004A……0x0089采樣圖譜短整型（2字節(jié)）64*2=128第3通道HFCT數(shù)據(jù)0x008A采樣均值短整型（2字節(jié)）乘以-1（dbm）0x008B采樣峰值短整型（2字節(jié)）乘以-1（dbm）0x008C峰值相位短整型（2字節(jié)）乘以360/64（°）0x008D保留短整型（2字節(jié)）默認為00x008E故障預警等級短整型（2字節(jié)）預警等級：0：設備運行正常（疑似局放2：持續(xù)關注3：重點關注0x008F……0x00CE采樣圖譜短整型（2字節(jié)）64*2=128附錄：CRC校驗算法c代碼：uint16_tMODBUS_CRC(uint8_t*p,uint16_tn){uint8_t i;uint8_tR0=0xff; //SetCRC16Highuint8_tR1=0xff; //SetCRC16Lowdo{ i=*p^R1;p++;R1=R0^CRC_TABLE_H[i];R0=CRC_TABLE_L[i];}while(--n!=0);return(R0*256+R1);}uint8_tCRC_TABLE_H[256]= //High{0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,};uint8_tCRC_TABLE_L[256]= //Low{0x00,0xC0,0xC1,0x01,0xC3,0x03,0x02,0xC2,0xC6,0x06,0x07,0xC7,0x05,0xC5,0xC4,0x04,0xCC,0x0C,0x0D,0xCD,0x0F,0xCF,0xCE,0x0E,0x0A,0xCA,0xCB,0x0B,0xC9,0x09,0x08,0xC8,0xD8,0x18,0x19,0xD9,0x1B,0xDB,0xDA,0x1A,0x1E,0xDE,0xDF,0x1F,0xDD,0x1D,0x1C,0xDC,0x14,0xD4,0xD5,0x15,0xD7,0x17,0x16,0xD6,0xD2,0x12,0x13,0xD3,0x11,0xD1,0xD0,0x10,0xF0,0x30,0x31,0xF1,0x33,0xF3,0xF2,0x32,0x36,0xF6,0xF7,0x37,0xF5,0x35,0x34,0xF4,0x3C,0xFC,0xFD,0x3D,0xFF,0x3F,0x3E,0xFE,0xFA,0x3A,0x3B,0xFB,0x39,0xF9,0xF8,0x38,0x28,0xE8,0xE9,0x29,0xEB,0x2B,0x2A,0xEA,0xEE,0x2E,0x2F,0xEF,0x2D,0xED,0xEC,0x2C,0xE4,0x24,0x25,0xE5,0x27,0xE7,0xE6,0x26,0x22,0xE2,0xE3,0x23,0xE1,0x21,0x20,0xE0,0xA0,0x60,0x61,0xA1,0x63,0xA3,0xA2,0x62,0x66,0xA6,0xA7,0x67,0xA5,0x65,0x64,0xA4,0x6C,0xAC,0xAD,0x6D,0xAF,0x6F,0x6E,0xAE,0xAA,0x6A,0x6B,0xAB,0x69,0xA9,0xA8,0x68,0x78,0xB8,0xB9,0x79,0xBB,0x7B,0x7A,0xBA,0xBE,0x7E,0x7F,0xBF,0x7D,0xBD,0xBC,0x7C,0xB4,0x74,0x75,0xB5,0x77,0xB7,0xB6,0x76,0x72,0xB2,0xB3,0x73,0xB1,0x71,0x70,0xB0,0x50,0x90,0x91,0x51,0x93,0x53,0x52,0x92,0x96,0x56,0x57,0x97,0x55,