The second batch of proposed admission time of Qinghai State Grid in 2023

The second batch of 2023 Qinghai State Grid is scheduled to be admitted at 20:00 on April 17, and the short-listed candidates will take the written test through news notice on the human resources recruitment platform of State Grid Corporation.

The written test time of State Grid is 180 minutes, and the test questions are judged by single-choice questions and multiple-choice questions, all of which are in the form of multiple-choice questions. The exam is about public and industry knowledge, professional knowledge.

Analysis of Knowledge Required by State Grid

1, circuit: the circuit accounts for a relatively large proportion, with a total of about 25 questions, and the score is about 16. There are many problems in circuit calculation, more complicated circuit diagram, and more problems in voltage source and controlled source.

2. Electrical machinery: electrical machinery is about 10, with a score of about 5 points. The main contents include the structure, model and working principle of transformer, synchronous motor and asynchronous motor, and there are many assessment contents. Last year, the evaluation focused on transformers.

3, power electronics: power electronics 10, the score is about 5 points; The main contents include the principle and characteristics of power electronic devices and the structure and principle of basic converter circuits.

4. Power system analysis: the score is about 6 points, which is difficult as a whole. The difficulty of the examination is mainly reflected in the fact that the knowledge points related to the examination questions are not commonly used and are easily missed in the review process. The knowledge points of power system analysis in this exam pay more attention to the investigation of the details and scope of knowledge. The content of the examination questions is quite different from the past. The basic knowledge of transformer and power line parameters is not involved, and there are not many tests on power flow calculation. The application of neutral point arc suppression coil grounding and frequency adjustment of interconnected power system appears in the test questions instead.

5. Relay protection: score 10 or so. The difficulty is reduced. The knowledge points are more conventional, and there are fewer single-item examinations, and there are many concepts of multiple-item examinations, which require a strong theoretical reserve and can be integrated, such as: the selection of the four basic requirements of relay protection; Principle and inspection requirements of three-stage current protection; The setting value of distance protection is affected by the increase of current; Principle of vertical protection; Double bus protection principle; Transformer gas protection and its backup protection, etc.