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HollySys Isolated Grid Stability Control System
Power System Reliability and Safety Experts Around You
Introduction
Industrial enterprises usually build super-large, comprehensive modernizationprojectswithcomplexprocesssystems anda largenumberof units,whichhave strictrequirementsforpower supply reliability. Any power outage or fluctuation may have a major impact on production.
For chemical enterprises dedicated tolarge-scaleintegrated continuousproduction,power outagescanresultinsevere consequences, including substantial economic losses,fires, explosions, and even casualties.Therefore,the ability of the isolatedgridoperationisessential.Islandedgridoperation technology allows enterprises to quicklyrestore production when externalpower supply is interrupted and effectively prevents shutdown incidents caused by external grid fluctuations.
Industrialproduction enterprises with high power consumption can effectivelycontrol energycostsby adopting the isolated grid operation technology,thereby reducing product production costs and enhancing their competitiveness inthe market.
Basedonitsrichexperienceinisolatedgridoperation projects, HollySys provides a full range of one-stop solutions forenterprises'powerstations.Evenundervariousextreme working conditions,the isolated grid stability control system canensurethestableoperationof theinternalpowergrid of an enterprise's power station. We are committed to assisting enterprises in achieving energy conservation and efficiency, ensuring the safety of enterprises and employees, and jointly promoting sustainable environmental development.
Isolated Grid Area
One-Stop Solution
HollySyscanprovideserswithafulrangeof onestopsolutionstosolevariousprolemsintheperationof enterprise power statinsgardessof extenaldisturbancsrnteralfalredisturbingpowe upysystem,theolate gri stabitycontrol ystemcanensurethesafeandstableoperationfeletricalqupment in thefatorysothatusersav no worries.
Toensure that thenterprisepowergridhastheilated gridperationability,Hlycanprovide thefolwing solt or services (not limited to):
High System Reliability
Based on HollySys ver 30years of experience in the processindustry,we have been committed toresearching the challengesandsoltionsf isolated gridoperationscenariosand havetailred high-reliabiltypwer supply sltinsfo uersnvariusindstrisolticanintelientlyoordinatendcontrlboirsteamturbinegeneratorsat networks lectrical and otherequipment achieveabalance etweenthermallad and electricalad, andhepindstry users operate safely and efficiently under various extreme working conditions.
Advancement Accuracy
Rapidity Comprehensiveness
Professionalism
Abandon the traditional frequency criterion and adopt the most advanced power criterion.
Adopt the active surveillance mode to actively enter the short-term islanding mode to ensure process safety.
Use 10 ms fast master controller so that the whole process response time is not more than 120 ms.
In addition to considering the balance of electrical load, the thermal load can also be balanced.
Provide the all-round one-stop solution by the cross-industry expert team.
System Architecture
ISS(HollySys Isolated GridStability ControlSystem) consists of afast master station and severalremote acquisition stations.hefast masterstationexeutesthecorecontrolstrategiesof th stabilitycotrol systemwhile theremt acquisition stations areresponsibleforcollecting electricalload data and executing loadshedding tasksThehumanmachine nterfacelayercaneindependentlyconfiguredwithoperatorstationsbasedono-siterequirements,orit can share operator stations with DEH (Digital Electro-Hydraulic System) and DCS (Distributed Control System).
Main Technical Data
TechnicalDataofISS
1 Stable operating frequency range for the system: 50 Hz ± 0.5 Hz
1 10 kV and below bus voltage maintained within ±7% during operation 35kV and abovebusvoltage maintainedwithin ±70% during operation
1 Operation period of the main controller of the system <=70 ms
■ Overallprocesstimeof the systemfrom signalacquisition,calculationto theoutputof actioninstructions: <= 40 ms
■ Total time fromtheoccurrence of anelectricalfault toloadshedding orfast load shedding in the system:≤120ms
TechnicalDataofDEH
Typical Cases
ISScanealdmeltokineeratioamainmetlinmltrolichmicalla wast-trmatilmweeratiytraffhrtfoman island powerplants,and otherindustries.
Power Industry
NgariUrban Investment Cogeneration Isolated Grid Stability Control Project
Project Information
End User Ngari Urban Investment Cogeneration Central Heating Co., Ltd.
Project Location Gar County, Tibet
Background
The project of Ngari Urban Investment Cogeneration Central Heating Co., Ltd.is located in Ngari, which is known as the roof of the world, with an average altitude of more than 4,500 meters, and an annual average temperature of about 0°C. The power grid capacity in Ngari is small, and the two generator units in the factory undertake 40% of the electricity load in the Ngari during thepeak period of electricity consumption,whichis a typical isolated grid operation mode.
Commissioning Time October 2020
Equipment Information
Two 75t/h medium-temperature and medium-pressurepulverized coal steam drum boilers, and two mediumtemperature and medium-pressure 6 MW extraction condensing steam turbine generator sets
Scope of Supply
One isolated grid main control cabinet, oneisolatedgridexpansioncabinet, and one fault isolation cabinet
Solution
A new set of isolated grid stability control system is added to the project,which cooperates with the original DEH, DCS,and synchronization units together to form a completeset of isolated grid stability control system.
Highlights
Once a fault occurs in the main power grid, the cogeneration units can operate independently,ensuring the electricity demand of users is met,maintaining the stability of the heating system, and improving the reliability and stability of the power grid.
Power Industry
Xinglong Thermal Power Company Isolated Grid Stability Control Project
| Project Information End User Xinglong Thermal Power Co., Ltd. |
| Project Location Xinglong County, Hebei |
| CommissioningTime March 2023 |
| EquipmentInformation Two 75 t/h steam boilers, two 75 t/h circulating fluidizedbed boilers,one 12Mwsteamturbinegenerator set, and one 15 MW steam turbine generatorset |
| Scope of Supply One isolated gridmain control cabinet,oneisolatedgridexpansion cabinet,onefault isolation cabinet, and one DEH (self-contained) |
Background
Xinglong Thermal Power Company is the main heating enterprise in Xinglong County. Currently it operates 32 heat exchange stations, with a primary pipeline network totaling 32 kilometers and a secondary pipeline network totaling 85 kilometers, serving approximately 28,000 households.The company plans to deploy an isolated grid stability control system toenhance the stability of theheating system and reduce operating costs.
Solution
The project adds one new isolated grid stability control system and one fault isolation cabinet,while upgrading the existing DEH low-pressure turbine oil system to a highpressure self-contained oil system. The original DEH electronic control system (T800K control system) on site is retained.
Highlights
After the implementation of the project,the stability and reliability of the heating system have been improved, and the operating costs of the heating system have been reduced. This enhances energy utilization efficiency and provides technical support for achieving "low-carbon, clean, and efficient" energy production and consumption.
Chemical Industry
Henan Zhonghong Coal Chemical Co., Ltd. Isolated Grid Stability Control Project
Project Information
| End User Henan Zhonghong Coal Chemical Co., Ltd. |
| Project Location Pingdingshan, Henan |
| CommissioningTime December 2022 |
| EquipmentInformation Two 60-hole fixed station type 6 m carbonization chamber tamping coke oven,one CDQ waste heat boiler, one N25Mw pure condensing steam turbinegeneratorset |
| Scope of Supply One islanding main control cabinet, four isolated grid expansion cabinets, oneautomatic synchronization cabinet,one fault isolation cabinet, and oneDEH(T800K+ self-contained oil system) |
Background
In 2010,the company completed and commissioned the world's first two 60-hole fixed station type 6-meter carbonization chamber tamping coke oven, featuring fully independent intellectual property rights. The company planed to deploy an isolated grid stability control system to prevent power outages and production stoppages caused by externalgrid instability orfaults
Solution
The project adds one isolated grid stability control system, one automatic synchronization cabinet, and one fault isolation cabinet.Additionally,the existing DEH (Woodward 505 control system and low-pressure turbine oil system) on site is upgraded to the T800K control system and a self-contained oil system.
Highlights
Aftertheimplementationof theproject,itensuressafe and efficient productionforusers in isolated grid operation mode.It not only improves the reliability and stability of the power grid but also achieves energy saving and emission reduction for the enterprise, thereby enhancing economic benefits.
Chemical Industry
Isolated Grid Stability Control Project of Bola Jingwei Fiber Co., Ltd.
| Project Information End User Bora Jingwei Fiber Co., Ltd. |
| Project Location Xiangfan, Hubei |
| Commissioning Time November 2021 |
| EquipmentInformation Two circulating fluidized bed boilers, one B15MW back pressure turbine generator set |
| Scope of Supply One isolated grid main control cabinet, three isolated grid expansion cabinets, one automatic synchronization cabinet,one fault isolation cabinet, and one DEH（T800K + self- contained) |
Background
Bora Jingwei Fiber Co., Ltd.has an annual production capacity of 30 KTA differentiated viscose staple fiber and 12 KTA sodium sulfate,with a production power load of 10 MW. To avoid losses caused by short-term power outages, the internal generator sets and downstream loads are required tohave the capability for short-term isolated grid operation.
Solution
The project adds one new isolated grid stability control system, one automatic synchronization cabinet, and one fault isolation cabinet.Additionally, the existing DEH on site (Woodward 505 control system and low-pressure turbine oil system) is upgraded to the T800K control system and a self-contained oil system.
Highlights
The implementation of the self-owned power plant islolated grid transformation project has improved the islolated grid operation capability of the user's self-owned power plant. It ensures the stability of the user's power grid and provides a safeguard for the company's safe production.
Petrochemical Industry
Indonesia PT Kutai Refinery Nusantara Isolated Grid Stability Control Project
Project Information
End User PT Kutai Refinery Nusantara
ProjectLocation Indonesia
Commissioning Time June 2022
Equipment Information Two 150 t/h boilers, and two 25 MW steamturbinegeneratorsets
Scope of Supply
One isolated grid main control cabinet, one isolated grid expansion cabinet, and one DEH (T800K ^+ selfcontained)
Background
PT Kutai Refinery Nusantara is a refinery in Indonesia focused on crude oil processing and petroleum product production. Wuxi Guolian Huaguang Power Station Engineering Co., Ltd. is the project's general contractor. The project's self-owned power plant provides production power to the nearby refinery. Since the project operates entirely in isolated grid operationmode with only two generatorsets,the system'sreliability is relativelylow.Inthe event of a generatorset failure,a power deficit would occur,directly impacting the refinery's production operations.
Solution
The project is equipped with one isolated grid stability control system,integrated with the HollySys DEH and DCS to form a comprehensive unified control platform,achieving fullintegration of multiple systems.
Highlights
After the implementation of the project, the refinery's production power supply is ensured to operate safely and efficiently in isolated grid operationmode.The isolated grid power plant canbetteradapt to different grid structures and load variations,offering greater economic efficiency and flexibility.
Food Processing Industry
Indonesia PT. Sari Dumai Oleo SD2 (Apical) Isolated Grid Stability Control Project
| Project Information End User PT. Sari Dumai Oleo SD2 (Apical) |
| Project Location Indonesia |
| CommissioningTime November 2023 |
| EquipmentInformation Two220 t/h boilers, and two 30MW steamturbinegeneratorsets |
| Scope of Supply One isolated grid maincontrol cabinet, and two isolated grid expansion cabinets |
Background
PT. Sari Dumai Oleo SD2 (Apical), headquartered in Indonesia, is a member of the Apical Group, primarily engaged in the production and sale of palm oil products and derivatives. Wuxi Guolian Huaguang Power Station Engineering Co., Ltd. is the project's general contractor.The user needs to achieve load transfer between two generator sets and five diesel generators,includingremote start-stop control of the diesel generators and some interlock requirements.
Solution
The project hardware uses the HollySys K-series main control system. In terms of software programming,DEH load control function blocks are primarily used to achieve theuser'srequirementsforstableload transfer.
Highlights
The isolated grid stability control system facilitates centralized control of all plant equipment for the user, enhancing the convenience and safety of starting and stopping operations of production equipment.This is particularly true forthe core function of load transfer,which hasbeenhighlypraised by the user.
Key Accounts
Singapore
Changi Business Park
Crescent,
#04-01/02/03 Plaza 8
@ CBP,Tower A,
Singapore 486025
China No.2 Di Sheng Middle Road, Economic-Technological Development Area, Beijing 100176
India D-84, Ground Floor, Sector 63, Noida, UttarPradesh201301
Indonesia Metropolitan Tower, 10th Floor Unit E JI. R.A. Kartini Kav. 14, Jakarta 12430
Uzbekistan
10, Mahmoud Tarabi
Street, Tashkent,
Uzbekistan
