综合能源热力潮流节点标幺值模型及算法实现

潮流计算是综合能源能量管理的基础，已有的综合能源潮流计算模型，采用电力网络节点模型与热力网络回路模型组合，实时潮流计算过程中，要在网络拓扑形成节点之后，搜索供热网络回路，形成多个独立的最小热力回路，在最小回路模型的基础上，做牛顿法潮流计算；为了方便与电网潮流的节点模型组合，提高综合能源潮流计算的算法效率和收敛性能，我们采用热力网络潮流节点标幺值模型，用热力节点的供水温度、回水温度、供水压力、回水压力作为热力网络状态量，用回水、供水节点净注入流量为零、回水、供水节点节点的注入能量为零作为基础模型，采用变尺度算法解热力潮流非线性方程组，只计算一次雅可比矩阵并求逆，通过递推来实现潮流计算，克服了牛顿法需要多次求导求逆的缺点，避免了搜索实时网络的最小回路，方便与电力网络节点模型联合求解，更适合大规模热-电联合系统中的潮流计算。

Unit value node model and Algorithm for Heat Power Flow in Integrated Energy System

Power flow calculation is the basis of energy management in integrated energy system. The existing power flow calculation model of the integrated energy adopts the combination of the power network node model and the heat network loop model. In the process of real-time power flow calculation, the heat network loop should be searched to form multiple independent minimum heat loops after network topology analysis forms nodes. Based on the minimum loop model, the Newton method is used to calculate the power flow; In order to facilitate the combination with the node model of power flow and improve the algorithm efficiency and convergence performance of integrated energy flow calculation, we use the unit value model of heat network node model: take the water supply temperature, return water temperature, supply pressure and return water pressure of the heat network as the state quantity of the network, and take the net injection flow of the return water and supply node as the zero, and the injection energy of the return water and supply node as the basic model, In this paper, BFS(Broyden Fietcher Shanmo) algorithm is used to solve the nonlinear equations of heat power flow. The Jacobian matrix is only calculated once and inversed. The power flow calculation is realized by recursion, which overcomes the shortcomings of Newton''s method that needs multiple derivation and inversions, avoids searching the minimum loop of real-time network, is convenient to solve jointly with the node model of power network, and is more suitable for the power flow calculation in large-scale heat electric power combined system..