HollySys is able to provide solutions that cover the whole natural gas industry chain, with intellectual property rights, competent functions, and wide service coverage. The approach is made from a client’s perspective to optimise the client’s production operations.

The integrated natural gas solutions monitor and control the pressure, temperature, flow, tightness, and equipment operating statuses pertaining to the different processes in the industry chain. This realises the monitoring, scheduling, and management of the different processes in the natural gas industry chain. After system production kicks-off, operators are able to manage the operations and monitor the system processes from the control centre.

SCADA System for Long-distance Natural Gas Pipelines 

The long-distance natural gas pipeline comprises a first station, sub-transmission station, intermediate compressor station, pigging stations and valve chamber, and cathode protection station. The automation control system for the natural gas pipeline network construction uses a supervisor control and data acquisition system (SCADA). The SCADA system can be used to monitor, schedule, and manage the whole natural gas pipeline from the dispatch control centre, so the stations along the whole pipeline can be either unmanned or controlled and managed with minimum manning. The SCADA system comprises mainly a dispatch control centre, station control system, and data transmission communication system.

Urban Natural Gas SCADA System

The urban natural gas system comprises the urban sluice gate station, urban high-pressure pipeline network, and high-mid pressure regulation station, mid-pressure backbone pipeline network, mid-pressure sub-backbone pipeline network, and courtyard pipeline network. The SCADA system comprises mainly a dispatch control centre, station control system, and data transmission communication system.

Dispatch control centre: Depending on the size of the SCADA system, the main dispatch control centre, back-up dispatch control centre, or regional dispatch control centre can be established to monitor the key high-mid pressure fuel gas pipeline stations and the remote control cut-off valve chambers. At the same time, it can also monitor the mid-pressure pipeline network monitoring points, and complete a series of tasks including the optimisation of pipeline operations, preparing transportation plants, and measurement management.

Station control system (SCS): Based on the pipeline network station distribution, SCS of different sizes shall be placed at sluice gate stations, pressure regulation stations, remote control cut-off valve chambers, and pipeline monitoring points. The SCS is the remote control monitoring station of the SCADA system. They execute commands that come from the main dispatch control centre, and acquisition and processing of station data, provide interlock protection, constant control, and monitoring of the operating status of the different process equipment. Following that, the acquired data and information is uploaded to the main dispatch control centre.

LNG Station Control System

The LNG station receives liquefied natural gas (LNG) from LNG plants and stores them before gasifying them for distribution to users. The LNG station control system has a MACS-SCADA production control platform, including 4 major systems: The equipment management system, manufacturing execution system (MES), operating training system (OTS), and advanced process control (APC). The LNG station’s core technology platform comprises a safety failure-tolerant computer, safety and reliable industrial Ethernet, fieldbus technology, distributed industrial I/O of large scale real-time database. The station control system's PLC uses LK large PLC, which supports double system hot backup, power source redundancy, Ethernet redundancy, and bus redundancy. The LNG station and the station's internal 3rd-party equipment generally use the standard MODBUS for communication.

CNG Automobile Gas Station Monitoring

The CNG automobile gas station monitoring system comprises mainly a monitoring computer, programmable logic controller, instrument and transmitter, and communication equipment. The station control system's PLC uses LK large PLC, which supports double system hot backup, power source redundancy, Ethernet redundancy, and bus redundancy. The CNG station and the station's 3rd-party equipment generally use the standard MODBUS for communication.

The CNG automobile gas station monitoring system includes: Optimised system, sequence control system, and emergency brake system. The sequence is such that gas is supplied to different steel cylinders from the optimised system control compressor, and also supplied to the gas filling machine from the high-pressure steel cylinder controlled by the sequence control system to improve the efficiency of the gas filling machine. The emergency brake system control rapidly cuts off the gas supplied from the high-pressure steel containers to the gas filling machine. The CNG automobile gas filling station monitoring system completes tasks such as data acquisition, valve control, interlocking protection, and measurement.

Monitoring of The Natural Gas Storage and Distribution Station

The demand for fuel may change with time, but the supply of gas is basically constant. The storage and distribution station’s main role is to buffer the difference between the gas supply and the gas demand, so as to achieve demand-supply equilibrium. The storage and distribution station can be divided into high-pressure storage and distribution station and low-pressure storage and distribution station. During demand troughs, part of the high-pressure pipeline’s high-pressure natural gas is stored in the storage tanks, which will be used to cater to high demand during demand peaks. The low pressure storage and distribution station is used to store low pressure natural gas. The natural gas storage distribution station’s automation control system comprises a monitoring computer, a programmable logic controller, instrument and transmitter, and communication equipment. The programmable logic controller uses the LK series PLC, which supports double system hot backup, power source redundancy, Ethernet redundancy, and bus redundancy. The storage and distribution station and the station's 3rd-party equipment generally use the standard MODBUS for communication.

General Accomplishments

Long-distance pipelines

•  SCADA system for construction of natural gas pipeline from Anyang to Luoyang as part of the Yuji Line for Sinopec

•  SCADA system for the natural gas pipeline from Hangzhou to Huzhou as part of the West-East natural gas transmission project

•  SCADA system for the natural gas pipeline from Hangzhou (Zhejiang Province) to Ningbo as part of the West-East natural gas transmission project

•  SCADA system for the South Henan supporting natural gas pipeline as part of the West-East natural gas transmission project

•  Station control system for receiving station in Wuhan / Yichang for the Sichuan-Eastern China Natural Gas Transmission Pipeline

•  SCADA system for the natural gas pipeline from Huanggang (Hubei Province) to Daye for the Sichuan-Eastern China Natural Gas Transmission Pipeline

•  SCADA system for the natural gas pipeline from Huang Pi to Macheng to Hong'an for the Sichuan-Eastern China Natural Gas Transmission Pipeline

•  SCADA system for the natural gas pipeline from Xiaochang – Qianjiang for the Sichuan-Eastern China Natural Gas Transmission Pipeline

•  Station Control System of Enshi Receiving Station for 2nd line of the West-East natural gas transmission project

Urban pipeline network

•  SCADA system for natural gas urban pipeline network in 7 counties and cities including Zhumadian City in Henan Province

•  SCADA system for natural gas utilisation works in Shaoxing

•  SCADA system for natural gas utilisation works in Hangzhou

•  SCADA system for natural gas utilisation works in Xinyu, Jiangxi

•  SCADA system for natural gas utilisation works in Zhongshan

•  SCADA system for fuel gas facilities in Qitaihe, Heilongjiang Province

•  SCADA system for natural gas utilisation works in Cixi, Zhejiang Province

•  SCADA system for natural gas utilisation works in Tongxiang, Zhejiang Province

•  Station control system of Hengshui Gate Station for CNPC

LNG

•  LNG storage station instrument system works in Shaoyang City, Hunan Province

•  LNG control system for Yunnan Riches Chemical Co., Ltd

•  100,000 nm3 LNG control system for Inner Mongolia Gongdaxuebei

•  LNG control system for Inner Mongolia Shitai Company

•  Smokeless LNG-12500 natural gas liquefaction equipment control system Jincheng City, Shanxi Province

•  Natural gas liquefaction equipment control system for the Tumed Left Banner, Inner Mongolia, Harbin Institute of Technology

•  80,000 Nm3/d LNG DCS for Gansu Xinlianhai Natural Gas LLC

•  Natural gas liquefaction control system for DeyangHongrun Light Hydrocarbon Chemical Co. Ltd

•  LNG natural gas liquefaction equipment control system for Bayan NurHengtai

•  LNG equipment control system for Henan Ancai Group

•  LNG liquefaction equipment control system for JiangyinTianhe

•LNG heat value stabilising system for Zhaoqing ENN Gas

CNG

•  CNG gas filling station monitoring system in Handan, Hebei Province

•  CNG master station monitoring system for Hengshui, Hebei Province

•  CNG control system for Dagang Oilfield in Tianjin Ci

•  CNG control system in Deqing County, Hanghu Natural Gas

Coal-to-natural gas

•  Natural gas development for Lichenglan, Changzhi, Shanxi Province

•  Coke oven coal gas facilities for WuhaiHuaqing Energy Technology Development Co., Ltd.