The “Generator Operation Regulations” issued for the first time by the former Ministry of Power Industry provided a basis for the preparation of on-site operation regulations for power plants, stipulated uniform operation standards for generators, and played a positive role in ensuring the safe and economic operation of generators. In 1982, the former Ministry of Water Resources and Electric Power revised the original regulations based on the development needs of the electric power industry and the summary of practical experience. The revised regulations have been issued in June 1982 for nearly 20 years. During this period, large-capacity, high-voltage, foreign-made generators have been put into operation one after another. The structure, materials, technical performance, degree of automation, auxiliary equipment and safety monitoring device configuration of the generator have undergone great changes with the progress of science and technology. Part of the provisions of the original regulations are no longer suitable for the current status of the equipment; with the accumulation of operation management experience, the improvement of management methods, and the continuous adoption of modern management methods, the operation unit’s level of generator operation management has been greatly improved, and it is still used The management procedures and methods stipulated in the original regulations can no longer meet the needs of ensuring the safe and economic operation of generators. This “Generator Operation Regulations” is applicable to steam turbine generators and hydroelectric generators. It is a common technical standard for both. Although the special regulations on steam turbine generators and hydroelectric generators are specified in the regulations, However, the combined focus is not strong enough, the use is not convenient, and the necessary and detailed regulations cannot be made for their respective characteristics. As the proportion of the installed capacity of hydropower plants continues to increase, it is necessary to formulate separate operating regulations for hydroelectric generators. Based on the above situation, in order to meet the needs of the development of production and the technological progress of the electric power industry and the need to be in line with international standards, the former Ministry of Electric Power Industry Department of Science and Technology [1994] No. 42 “Regarding the issue of the establishment and revision of the power industry standards in 1994 (first The “Notice of Approval” issued the task of revising the “Generator Operation Regulations” issued by the original Ministry of Water Resources and Electric Power by the former Northeast Electric Power Group Company and re-compiling the “Hydrogenerator Operation Regulations”.
The compilation of “Hydraulic Generator Operation Regulations” began at the end of 1995. Under the organization and leadership of the former Northeast Electric Power Group Corporation, Fengman Power Plant was responsible for the revision and compilation of the regulations. In the process of revision of the regulations, the original regulations were analyzed and studied in detail, and the related documents on generator design, manufacturing, technical conditions, use requirements, technical standards and other documents were consulted, combined with the specific conditions of the current hydro-generator manufacturing and operation. And the development of technology in the future, the original regulations are proposed to retain, delete, modify, supplement, and improve the content. On this basis, after investigating and soliciting opinions on some hydropower plants, a preliminary draft of the regulations was put forward and a draft for review was formed. In May 1997, the Standardization Department of the China Electricity Council organized a preliminary review meeting of the “Hydraulic Generator Operation Regulations” (draft for review). The review committee composed of design institutes, electric power bureaus, hydropower plants and other units conducted a serious review of the regulations. Review and put forward requirements for the problems existing in the content of the regulations and the matters needing attention in the preparation. On the basis of the review, the writing unit revised and supplemented it again, and put forward the “Hydraulic Generator Operation Regulations” (draft for approval).
Important technical content changes include the following points:
(1) The internal water-cooled generator is listed as a chapter in the original regulations. In view of the fact that there are very few internal water-cooled hydroelectric generators in operation in China, and some have been changed to air-cooled, they will rarely appear in the future. Therefore, the issue of internal water-cooling is not included in this revision. For the evaporative cooling type developed in China in recent years, it is still in the experimental stage, and the number of units in operation is very small. The problems related to evaporative cooling are not included in this regulation. They can be added in the on-site operation regulation according to the manufacturer’s regulations and actual conditions. add.
(2) This regulation is the only industry standard that should be followed for the operation of hydroelectric generators in hydropower plants. On-site operation and management personnel should be proficient and strictly enforced. However, in view of the fact that on-site operators do not necessarily have knowledge of the national and industry standards related to the design, manufacturing, technical conditions and other standards of hydro-turbine generators, and do not understand some of the provisions related to the operation of hydro-turbine generators, this revision Some important provisions related to operation in the above-mentioned standards should be included in the above-mentioned standards, so that on-site operation managers can master these contents and better manage the use of generators.
(3) In view of the increasing number of pumped-storage power stations in China, in addition to the requirements of this regulation, a chapter is devoted to special situations and variable frequency starting devices related to the operation of generators/motors under various operating conditions, motor starting and other issues.
(4) Regarding the “unattended” (small number of people on duty) new duty mode involving generator operation, certain principles have been stipulated to meet the needs of the new operation management mode. During the implementation process, some new problems may arise, and the operating unit should determine it based on the actual situation on the premise of ensuring safe operation.
(5) The domestic large-scale unit thrust bearing imported from Russia produced elastic metal plastic bearing technology. After ten years of development and operation test, good application results have been obtained, and it has become the development trend of the domestic large-scale unit thrust bearing. According to the provisions of DL/T 622—1997 “Technical Conditions for Flexible Metal Plastic Thrust Bearings of Vertical Hydrogenerators” approved and issued by the former Ministry of Electric Power Industry in 1997, this regulation controls the operating temperature of plastic bearings, and controls the start and shutdown of the unit. Provisions are made for problems such as cooling water interruption fault handling.
This regulation has a guiding role in the preparation of site regulations for each hydropower plant. Based on this, each hydropower plant and the manufacturer’s documents will compile site regulations based on actual conditions.
This regulation was proposed by the former Ministry of Electric Power Industry.
This regulation is under the jurisdiction of the Hydrogenerator Standardization Technical Committee of the Electric Power Industry.
Drafting organization of this regulation: Fengman Power Plant.
The main drafters of this regulation: Sun Jiazhen, Xu Li, Geng Fu. This regulation is interpreted by the Technical Committee for Standardization of Hydrogenerators in the Electric Power Industry.
General Principles of Reference Standards
3.1 General requirements
3.2 Measurement, signal, protection and monitoring devices
3.3 Excitation system
3.4 Cooling system
3.5 Bearing
4. The operating mode of the generator
4.1 Operation mode under rated conditions
4.2 Operation mode when inlet air temperature fluctuates
4.3 Operation mode when voltage, frequency and power factor change
5 Monitoring, inspection and maintenance of generator operation
5.1 Starting, paralleling, loading and stopping of generators
5.2 Monitoring, inspection and maintenance during generator operation
5.3 Inspection and maintenance of slip ring and exciter commutator brush
5.4 Inspection and maintenance of excitation device
6 Generator abnormal operation and accident handling
6.1 Accidental overload of generator
6.2 Accident handling of generators
6.3 Failure and abnormal operation of generator
6.4 Failure of the excitation system
7. Operation of generator/motor
7.1 Operation mode of generator/motor
7.2 Starting, paralleling, running, stopping and working condition conversion of generator/motor
7.3 Frequency conversion device
6.4 Failure of the excitation system
7 Operation of generator/motor
7.1 Operation mode of generator/motor
7.2 Starting, paralleling, running, stopping and working condition conversion of generator/motor
7.3 Frequency conversion device
People’s Republic of China Electric Power Industry Standard
Water turbine generator operating regulations DL/T 751-2001
Code for hydraulic turbine generator
This standard specifies the basic technical requirements, operation mode, operation, inspection and maintenance, accident handling and other related matters for the operation of hydroelectric generators.
This standard applies to synchronous hydro-generators of 10 MW and above in the power industry system (synchronous hydro-generators below 10 MW can be implemented by reference). This standard also applies to generators/motors of pumped storage units.
Reference Standard
The provisions contained in the following standards constitute the provisions of this standard through quotation in this standard. At the time of publication, the editions indicated were valid. All standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards.
GB/T7409—1997
Synchronous motor excitation system
Technical requirements for excitation system of large and medium synchronous generators
GB 7894—2000
Basic technical conditions of hydro-generator
GB 8564—1988
Technical Specification for Installation of Hydrogenerator
DL/T 491—1992
Regulations for operation and maintenance of large and medium-sized hydro-generator static rectifier excitation system devices
DL/T 583—1995
Technical conditions of static rectification excitation system and device for large and medium hydro-generators
DL/T 622—1997
Technical requirements for elastic metal plastic thrust bearing bush of vertical hydro-generator
General
3.1 General requirements
3.1.1 Each turbine generator (hereinafter referred to as generator) and excitation device (including exciter) should have the manufacturer’s rating nameplate. The energy storage unit shall be marked with rating nameplates for power generation and pumping conditions respectively.
3.1.2 In order to check the quality after manufacturing, installation and maintenance, and to grasp the parameters and characteristics of the generator, necessary tests should be carried out in accordance with the relevant regulations of the national and industry standards to determine whether the generator can be put into operation.
3.1.3 The main ancillary equipment such as the generator body, excitation system, computer monitoring system, cooling system and so on in operation should be kept intact, and the protection devices, measuring instruments and signal devices should be reliable and accurate. The whole unit should be able to carry rated load under the specified parameters and run for a long time under the allowed operation mode.
3.1.4 Changes in the structure of the main components of the generator shall be subject to a technical and economic demonstration, and the manufacturer’s opinions shall be sought, and submitted to the higher-level competent authority for approval.
Post time: Oct-11-2021
