GB/T 36285-2018Specification for steam turbine electro-hydraulic control systems in thermal power plants (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Electricity Council. This standard is under the jurisdiction of the National Power Plant Process Monitoring and Information Standardization Technical Committee (SAC/TC376). This standard was drafted. Xi'an Thermal Power Research Institute Co., Ltd., Shanghai Electric Power Station Equipment Co., Ltd., Shanghai Xinhua Control Technology Group Technology Co., Ltd. The main drafters of this standard. Jia Qiangbang, Yang Xinmin, Yang Yongqing, Xu Jun, Gao Haidong, Huang Haiyue, Du Jun, Xia Xinlei, Yan Weibin. Thermal power plant steam turbine electro-hydraulic Control system technical conditions

1 Scope

China's national specification for the digital electro-hydraulic control system of a steam turbine in a thermal power plant. It specifies the terms and definitions, the basic provisions and the application functions, covering the basic requirements, the human machine interface, the control functions, the limiting functions and the protections. The turbine governor is the oldest closed-loop control in industrial use and still one of the most demanding. It admits steam to a machine of several hundred megawatts turning at three thousand revolutions a minute, and it must hold speed against load changes, share load with other units on the grid, respond to the grid's frequency within a second, and above all shut the steam off completely when required. Overspeed is the failure that destroys a turbine: with the generator disconnected and steam still admitted, the rotor accelerates until it disintegrates. That is why the limiting and protective functions are specified alongside the control ones, and why they are kept independent of them.

This standard specifies the functions, performance indicators and technical requirements of the electro-hydraulic control system for steam turbines in thermal power plants. This standard is applicable to the steam turbine electro-hydraulic control system (DEH) of units with a single unit capacity of 300MW and above for newly built or renovated thermal power plants. The steam electro-hydraulic control system of other capacity units can be referred to.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2421.1 Overview and guidelines for environmental testing of electrical and electronic products

GB/T 4208 enclosure protection grade (IP code) Quality of mineral turbine oil in

GB/T 7596 power plant operation

GB 11120 turbine oil General technical conditions for

GB/T 13384 mechanical and electrical product packaging

GB/T 17214.1 Industrial process measurement and control devices - Working conditions - Part 1

GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test

GB/T 17626.3 Electromagnetic compatibility test and measurement technology RF electromagnetic field radiation immunity test

GB/T 17626.4 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test

GB/T 17626.5 Electromagnetic compatibility test and measurement technology Surge (impact) immunity test

GB/T 17626.8 Electromagnetic compatibility test and measurement technology power frequency magnetic field immunity test

GB/T 17626.11 Electromagnetic compatibility test and measurement techniques Immunity test for voltage dips, short interruptions and voltage changes

GB/T 18271.3 Methods and procedures for the evaluation of general performance - Part 3.

3 Terms and definitions

The following terms and definitions as defined in GB/T 26863-2011 apply to this document. For ease of use, the following is repeated Some terms and definitions in GB/T 26863-2011.

3.1 Turbine electro-hydraulic control system digitalelectro-hydrauliccontrolsystem; DEH Sensitive components consisting of electrical principles, digital circuits (computers), amplifying components consisting of electrical/hydraulic principles and hydraulic principle groups The turbine control system composed of the servo mechanism is referred to as digital ESC.